From 4c0b9abd9616a7cb6d6c944e0a1bd451bdc1c721 Mon Sep 17 00:00:00 2001
From: Pierre Raybaut <1311787+PierreRaybaut@users.noreply.github.com>
Date: Tue, 27 Oct 2026 11:23:46 +0100
Subject: [PATCH 1/4] fix: read real SPEC and XDI files as reference readers do

SPEC: MCA spectra are grouped by device (@A1, @A2...) with their own
calibration and channels, instead of mixing devices and reading the device
number as a first channel. Labels separated by single spaces are split
according to the column count, repeated labels get a suffix, empty motor
lines and None values (Bluesky) are accepted, and other '@' lines are
ignored. A scan that cannot be read is skipped with the error instead of
stopping the import or File > Open.

MCA spectra are imported as one image per device (one spectrum per row),
mesh scans as images of the two motors, and scan headers are kept as
metadata.

XDI: files are read as UTF-8, invalid data tables are refused with their
line as the XDI library does, invalid header lines are recorded, comments
and all fields are kept as metadata, angles are converted to energies with
the lattice spacing, and outer scans give one signal per block.

The formats are removed and registered again with Sigima's public API.

Assisted-by: Claude Opus 5.5
---
 src/datalab_synchrotron/adapters/desktop.py |  87 ++--
 src/datalab_synchrotron/core/__init__.py    |  21 +-
 src/datalab_synchrotron/core/convert.py     | 532 ++++++++++++++++----
 src/datalab_synchrotron/core/spec.py        | 226 +++++++--
 src/datalab_synchrotron/core/xdi.py         | 212 ++++++--
 src/datalab_synchrotron/formats.py          |  58 ++-
 tests/integration/test_desktop_adapter.py   |  93 +++-
 tests/support/spec_files.py                 |  61 ++-
 tests/unit/test_formats.py                  |  32 +-
 tests/unit/test_scan_import.py              |  48 +-
 tests/unit/test_spec.py                     | 147 +++++-
 tests/unit/test_xdi.py                      | 125 ++++-
 12 files changed, 1376 insertions(+), 266 deletions(-)

diff --git a/src/datalab_synchrotron/adapters/desktop.py b/src/datalab_synchrotron/adapters/desktop.py
index ac2922f..a9acafd 100644
--- a/src/datalab_synchrotron/adapters/desktop.py
+++ b/src/datalab_synchrotron/adapters/desktop.py
@@ -22,10 +22,11 @@
     check_scan_selection,
     import_scan,
     is_spec_file,
+    mesh_shape,
     select_scans,
     summarize_skipped,
 )
-from ..formats import unregister_formats
+from ..formats import register_formats, unregister_formats
 from ..mappings import register_mappings, unregister_mappings
 from ..workflow import (
     ABSORPTION_RECIPE,
@@ -36,7 +37,7 @@
 from ..workflow import EXAMPLES as WORKFLOW_EXAMPLES
 from ..workflow import RECIPES as WORKFLOW_RECIPES
 
-#: Number of signals added to the workspace at once by the SPEC import
+#: Number of objects added to the workspace at once by the SPEC import
 ADD_BATCH_SIZE = 200
 
 PLUGIN_ICON = "datalab_synchrotron:icons/synchrotron.svg"
@@ -45,10 +46,17 @@
 
 
 def _import_parameters(spec: SpecFile) -> gds.DataSet:
-    """Return the import parameters of a SPEC file, with its columns as choices."""
+    """Return the import parameters of a SPEC file, with its columns and MCA devices
+    as choices.
+
+    The MCA and mesh items are hidden if no scan has MCA spectra or is a mesh scan.
+    """
     labels: list[str] = []
+    devices: list[str] = []
     for info in spec.scans:
         labels.extend(label for label in info.labels if label not in labels)
+        devices.extend(device for device in info.mca_devices if device not in devices)
+    has_mesh = any(mesh_shape(info) is not None for info in spec.scans)
     # Default columns: those of the most frequent scan structure
     structures = collections.Counter(info.labels for info in spec.scans if info.labels)
     first = structures.most_common(1)[0][0] if structures else ("",)
@@ -67,7 +75,17 @@ class SpecImportParameters(gds.DataSet):
         counters = gds.MultipleChoiceItem(
             _("Counters"), choices, default=[first[-1]]
         ).vertical(3)
-        mca = gds.BoolItem(_("MCA spectra"), default=False)
+        mca = gds.MultipleChoiceItem(
+            _("MCA spectra"),
+            [(device, device) for device in devices] or [("", "-")],
+            default=[],
+            help=_("One image per device and scan: one spectrum per row"),
+        ).set_prop("display", hide=not devices)
+        mesh = gds.BoolItem(
+            _("Mesh scans as images"),
+            default=True,
+            help=_("Counters of mesh scans as images of the two motors"),
+        ).set_prop("display", hide=not has_mesh)
 
     return SpecImportParameters(title=osp.basename(spec.path))
 
@@ -124,7 +142,9 @@ def open_cu_foil_example(self) -> PluginExample | None:
         return self.launch_example(CU_FOIL_EXAMPLE.id)
 
     def register_hooks(self) -> None:
-        """Apply the shipped HDF5 data mappings."""
+        """Register the file formats (again, after an unload) and apply the
+        shipped HDF5 data mappings."""
+        register_formats()
         register_mappings()
 
     def unregister_hooks(self) -> None:
@@ -160,24 +180,25 @@ def import_spec_scans(self, filename: str | None = None) -> int:
                 return 0
             keys = select_scans(spec, param.scans)
             counters = list(param.counters)
-            check_scan_selection(param.x, counters, param.mca)
+            devices = [device for device in param.mca if device]
+            check_scan_selection(param.x, counters, devices)
         except ValueError as exc:
             self.show_error(str(exc))
             return 0
         count, skipped, cancelled = self._add_scans(
-            spec, keys, param.x, counters, param.mca
+            spec, keys, param.x, counters, devices, param.mesh
         )
         report = summarize_skipped(skipped)
         if cancelled:
             self.show_info(
-                _("Import cancelled: %d signal(s) imported.") % count
+                _("Import cancelled: %d object(s) imported.") % count
                 + "".join("\n" + line for line in report)
             )
         elif count == 0:
-            self.show_error(_("No signal was imported:") + "\n" + "\n".join(report))
+            self.show_error(_("Nothing was imported:") + "\n" + "\n".join(report))
         elif skipped:
             self.show_warning(
-                _("Selected columns were not imported from %d of %d scans:")
+                _("Selected data was not imported from %d of %d scans:")
                 % (len(skipped), len(keys))
                 + "\n"
                 + "\n".join(report)
@@ -190,12 +211,15 @@ def _add_scans(
         keys: list[str],
         x: str,
         counters: list[str],
-        include_mca: bool,
+        mca_devices: list[str],
+        mesh_as_images: bool,
     ) -> tuple[int, list[SkippedScan], bool]:
-        """Read and add scans one at a time, in a group each, until cancelled.
+        """Read and add scans one at a time, until cancelled: signals in a group of
+        the signal panel, images in a group of the image panel, named after the
+        scan.
 
         Returns:
-            Number of added signals, skipped scans, and True if cancelled
+            Number of added objects, skipped scans, and True if cancelled
         """
         count, skipped = 0, []
         title = _("Importing SPEC scans")
@@ -209,26 +233,31 @@ def _add_scans(
                 QW.QApplication.processEvents()
                 if progress.wasCanceled():
                     return count, skipped, True
-                group, reason = import_scan(spec, key, x, counters, include_mca)
+                group, reason = import_scan(
+                    spec, key, x, counters, mca_devices, mesh_as_images
+                )
                 if reason is not None:
                     skipped.append(reason)
                 if group is None:
                     continue
-                group_id = self.proxy.add_group(group.title, panel="signal")
-                signals = group.signals
-                for start in range(0, len(signals), ADD_BATCH_SIZE):
-                    progress.setLabelText(
-                        _("Adding signals of scan %s (%d of %d)")
-                        % (key, start, len(signals))
-                    )
-                    QW.QApplication.processEvents()
-                    if progress.wasCanceled():
-                        return count, skipped, True
-                    batch = signals[start : start + ADD_BATCH_SIZE]
-                    self.signalpanel.add_objects(
-                        batch, group_id=group_id, set_current=False
-                    )
-                    count += len(batch)
+                for panel_name, panel, objects in (
+                    ("signal", self.signalpanel, group.signals),
+                    ("image", self.imagepanel, group.images),
+                ):
+                    if not objects:
+                        continue
+                    group_id = self.proxy.add_group(group.title, panel=panel_name)
+                    for start in range(0, len(objects), ADD_BATCH_SIZE):
+                        progress.setLabelText(
+                            _("Adding objects of scan %s (%d of %d)")
+                            % (key, start, len(objects))
+                        )
+                        QW.QApplication.processEvents()
+                        if progress.wasCanceled():
+                            return count, skipped, True
+                        batch = objects[start : start + ADD_BATCH_SIZE]
+                        panel.add_objects(batch, group_id=group_id, set_current=False)
+                        count += len(batch)
             progress.setValue(len(keys))
         return count, skipped, False
 
diff --git a/src/datalab_synchrotron/core/__init__.py b/src/datalab_synchrotron/core/__init__.py
index 98f40b7..2b0e008 100644
--- a/src/datalab_synchrotron/core/__init__.py
+++ b/src/datalab_synchrotron/core/__init__.py
@@ -1,19 +1,26 @@
 """Host-independent readers of experimental data formats, and XAS analysis."""
 
 from .convert import (
+    HC_EV_ANGSTROM,
+    MeshShape,
     ScanGroup,
     ScanImport,
     SkippedScan,
     check_scan_selection,
     import_scan,
-    mca_signals,
+    mca_images,
+    mesh_images,
+    mesh_shape,
     plan_scan_import,
+    scan_metadata,
     scan_signals,
     select_scans,
     summarize_skipped,
+    xdi_energy,
+    xdi_metadata,
     xdi_signals,
 )
-from .spec import SpecFile, SpecScan, SpecScanInfo, is_spec_file
+from .spec import SpecFile, SpecScan, SpecScanInfo, is_spec_file, mca_device
 from .xas import (
     MAX_EDGE_KEV,
     Absorption,
@@ -28,11 +35,13 @@
 from .xdi import XdiColumn, XdiFile, is_xdi_file, read_xdi
 
 __all__ = [
+    "HC_EV_ANGSTROM",
     "MAX_EDGE_KEV",
     "Absorption",
     "AbsorptionMode",
     "EdgeNormalization",
     "EnergyUnit",
+    "MeshShape",
     "ScanGroup",
     "ScanImport",
     "SkippedScan",
@@ -48,12 +57,18 @@
     "import_scan",
     "is_spec_file",
     "is_xdi_file",
-    "mca_signals",
+    "mca_device",
+    "mca_images",
+    "mesh_images",
+    "mesh_shape",
     "normalize_edge",
     "plan_scan_import",
     "read_xdi",
+    "scan_metadata",
     "scan_signals",
     "select_scans",
     "summarize_skipped",
+    "xdi_energy",
+    "xdi_metadata",
     "xdi_signals",
 ]
diff --git a/src/datalab_synchrotron/core/convert.py b/src/datalab_synchrotron/core/convert.py
index f6d6a0c..6cb4f42 100644
--- a/src/datalab_synchrotron/core/convert.py
+++ b/src/datalab_synchrotron/core/convert.py
@@ -1,4 +1,10 @@
-"""Conversion of SPEC scans and XDI files to signals recording their origin."""
+"""Conversion of SPEC scans and XDI files to signals and images recording their
+origin.
+
+The header information of the files (SPEC scan headers, XDI fields and comments)
+is kept as object metadata, while the ``experimental_source`` metadata entry
+identifies where the data comes from.
+"""
 
 from __future__ import annotations
 
@@ -9,47 +15,125 @@
 
 import numpy as np
 from sigima.objects import (
+    ImageObj,
     SignalObj,
+    create_image,
     create_signal,
     make_experimental_source,
     set_experimental_source,
 )
 
-from .spec import SpecFile, SpecScan
-from .xdi import XdiFile
+from .spec import SpecFile, SpecScan, SpecScanInfo
+from .xdi import XdiColumn, XdiFile
 
 __all__ = [
+    "HC_EV_ANGSTROM",
+    "MeshShape",
     "ScanGroup",
     "ScanImport",
     "SkippedScan",
     "check_scan_selection",
     "import_scan",
-    "mca_signals",
+    "mca_images",
+    "mesh_images",
+    "mesh_shape",
     "plan_scan_import",
+    "scan_metadata",
     "scan_signals",
     "select_scans",
     "summarize_skipped",
+    "xdi_energy",
+    "xdi_metadata",
     "xdi_signals",
 ]
 
+#: Planck constant times the speed of light, in eV.Å (exact SI values)
+HC_EV_ANGSTROM = 12398.419843320026
+
+#: Relative tolerance on the steps of evenly spaced image coordinates
+_UNIFORM_RTOL = 1e-9
+
 
-def _source(spec: SpecFile, scan: SpecScan, selection: dict, conversions) -> dict:
-    """Return the experimental source of a signal read from a scan."""
+def _source(
+    spec: SpecFile, scan: SpecScan, selection: dict, conversions: Sequence[str]
+) -> dict:
+    """Return the experimental source of an object read from a scan."""
     details = {"command": scan.info.command, "date": scan.info.date}
     if scan.motors:
         details["motors"] = dict(scan.motors)
     if scan.problems:
         details["skipped_lines"] = len(scan.problems)
+    if scan.ignored:
+        details["ignored_lines"] = dict(scan.ignored)
     return make_experimental_source(
         "spec",
         spec.path,
         entry=scan.info.key,
         selection=selection,
-        conversions=conversions or None,
+        conversions=list(conversions) or None,
         details=details,
     )
 
 
+def _value_and_note(text: str) -> tuple[float, str]:
+    """Return the number and the parenthesized note of a header line, e.g.
+    ``60  (Clock)``."""
+    match = re.match(r"(\S+)\s*(?:\((.*)\))?", text)
+    if match is None:
+        raise ValueError(f"No value in '{text}'")
+    return float(match.group(1)), (match.group(2) or "").strip()
+
+
+def scan_metadata(scan: SpecScan) -> dict[str, object]:
+    """Return the scan header information kept as object metadata.
+
+    Keys: ``SPEC count time`` and ``SPEC count time unit`` (``#T``), ``SPEC monitor
+    count`` and ``SPEC monitor counter`` (``#M``), ``SPEC hkl`` (``#Q``), ``SPEC
+    geometry G<n>`` (``#G<n>``), ``SPEC comments`` (``#C`` lines, one per line),
+    and ``SPEC MD <name>`` (``#MD <name> = <value>`` lines written by Bluesky).
+    Header lines that cannot be read are left out.
+    """
+    metadata: dict[str, object] = {}
+    comments: list[str] = []
+    for line in scan.header[1:]:
+        tag, _sep, text = line.strip().partition(" ")
+        text = text.strip()
+        try:
+            if tag in ("#T", "#M") and text:
+                value, note = _value_and_note(text)
+                name, note_name = (
+                    ("count time", "count time unit")
+                    if tag == "#T"
+                    else ("monitor count", "monitor counter")
+                )
+                metadata[f"SPEC {name}"] = value
+                if note:
+                    metadata[f"SPEC {note_name}"] = note
+            elif tag == "#Q" and text:
+                metadata["SPEC hkl"] = np.array([float(word) for word in text.split()])
+            elif re.fullmatch(r"#G\d+", tag) and text:
+                metadata[f"SPEC geometry {tag[1:]}"] = np.array(
+                    [float(word) for word in text.split()]
+                )
+            elif tag == "#C" and text:
+                comments.append(text)
+            elif tag == "#MD" and "=" in text:
+                name, value = text.split("=", 1)
+                if name.strip():
+                    metadata[f"SPEC MD {name.strip()}"] = value.strip()
+        except ValueError:
+            continue
+    if comments:
+        metadata["SPEC comments"] = "\n".join(comments)
+    return metadata
+
+
+def _finish(obj: SignalObj | ImageObj, source: dict, metadata: dict) -> None:
+    """Record the header metadata and the origin of an object."""
+    obj.metadata.update(metadata)
+    set_experimental_source(obj, source)
+
+
 def scan_signals(
     spec: SpecFile, scan: SpecScan, x: str, counters: Sequence[str]
 ) -> list[SignalObj]:
@@ -61,6 +145,7 @@ def scan_signals(
         ValueError: if a column does not exist
     """
     xdata = scan.column(x)
+    metadata = scan_metadata(scan)
     signals = []
     for counter in counters:
         signal = create_signal(
@@ -69,51 +154,208 @@ def scan_signals(
             scan.column(counter).copy(),
             labels=(x, counter),
         )
-        selection = {"x": x, "y": counter}
-        set_experimental_source(signal, _source(spec, scan, selection, None))
+        source = _source(spec, scan, {"x": x, "y": counter}, ())
+        _finish(signal, source, metadata)
         signals.append(signal)
     return signals
 
 
-def mca_signals(
-    spec: SpecFile, scan: SpecScan, indices: Sequence[int] | None = None
-) -> list[SignalObj]:
-    """Return MCA spectra of a scan, on calibrated X if the scan declares it.
+def _is_strictly_monotonic(values: np.ndarray) -> bool:
+    """Return True if values are finite and strictly increasing or decreasing."""
+    if not np.all(np.isfinite(values)):
+        return False
+    steps = np.diff(values)
+    return bool(np.all(steps > 0) or np.all(steps < 0))
 
-    The X axis is the channel number, or ``a + b * channel + c * channel**2``
-    with the ``#@CALIB`` coefficients of the scan.
+
+def _image(
+    title: str,
+    data: np.ndarray,
+    coords: tuple[np.ndarray, np.ndarray],
+    labels: tuple[str, str, str],
+    conversions: list[str],
+) -> ImageObj:
+    """Return an image with increasing coordinates, uniform if evenly spaced.
+
+    Args:
+        title: image title
+        data: image values, one row per Y coordinate
+        coords: strictly monotonic X and Y coordinates
+        labels: X, Y and Z labels
+        conversions: conversions applied to the values, completed with the axes
+         reversed to increasing order
     """
-    signals = []
-    for index in range(len(scan.mca)) if indices is None else indices:
-        channels = scan.mca_channels_axis(index)
-        conversions = []
-        xlabel = "Channel"
-        if scan.mca_calibration is not None:
-            a, b, c = scan.mca_calibration
-            x = a + b * channels + c * channels**2
-            conversions.append(f"channels -> a + b*ch + c*ch^2 with {a}, {b}, {c}")
-            xlabel = "Calibrated channel"
-        else:
-            x = channels
-        signal = create_signal(
-            f"MCA {index} (scan {scan.info.key})",
-            np.asarray(x, dtype=float),
-            scan.mca[index].astype(float),
-            labels=(xlabel, "Counts"),
+    xvals, yvals = (np.asarray(values, dtype=float) for values in coords)
+    for axis, (values, label) in enumerate(((yvals, labels[1]), (xvals, labels[0]))):
+        if values.size > 1 and values[-1] < values[0]:
+            data = np.flip(data, axis=axis)
+            conversions.append(f"axis '{label}': reversed to increasing order")
+    xvals, yvals = np.sort(xvals), np.sort(yvals)
+    image = create_image(title, np.ascontiguousarray(data), labels=labels)
+    steps = [np.diff(values) for values in (xvals, yvals)]
+    if all(
+        step.size < 2 or np.allclose(step, step[0], rtol=_UNIFORM_RTOL, atol=0.0)
+        for step in steps
+    ):
+        dx, dy = (float(step[0]) if step.size else 1.0 for step in steps)
+        image.set_uniform_coords(dx, dy, float(xvals[0]), float(yvals[0]))
+    else:
+        image.set_coords(xvals, yvals)
+    return image
+
+
+def mca_images(
+    spec: SpecFile, scan: SpecScan, x: str = "", devices: Sequence[str] | None = None
+) -> list[ImageObj]:
+    """Return the MCA spectra of a scan as one image per device.
+
+    Each row holds the spectrum of a point. The X axis is the channel number, or
+    ``a + b * channel + c * channel**2`` with the ``#@CALIB`` coefficients of the
+    device, if they give strictly monotonic values. The Y axis is the X column
+    of the scan, if it holds one strictly monotonic value per spectrum, else the
+    point number.
+
+    Args:
+        spec: SPEC file
+        scan: scan read from the file
+        x: X column of the scan (empty: point numbers)
+        devices: MCA devices (default: all devices of the scan)
+
+    Raises:
+        ValueError: if a device has no spectrum, or spectra of several sizes
+    """
+    metadata = scan_metadata(scan)
+    images = []
+    for device in scan.mca if devices is None else devices:
+        spectra = scan.mca.get(device, ())
+        channels = scan.channel_numbers(device)
+        conversions = [f"spectra -> image rows ({len(spectra)} spectra)"]
+        xvals, xlabel = channels, "Channel"
+        calibration = scan.calibration(device)
+        if calibration is not None:
+            a, b, c = calibration
+            calibrated = a + b * channels + c * channels**2
+            if _is_strictly_monotonic(calibrated):
+                xvals, xlabel = calibrated, "Calibrated channel"
+                conversions.append(f"channels -> a + b*ch + c*ch^2 with {a}, {b}, {c}")
+            else:
+                conversions.append("calibration not monotonic: channel numbers kept")
+        yvals, ylabel = np.arange(len(spectra), dtype=float), "Point"
+        if x in scan.info.labels:
+            column = scan.column(x)
+            if column.size == len(spectra) and _is_strictly_monotonic(column):
+                yvals, ylabel = column, x
+        image = _image(
+            f"{device} (scan {scan.info.key})",
+            np.vstack(spectra),
+            (xvals, yvals),
+            (xlabel, ylabel, "Counts"),
+            conversions,
         )
-        set_experimental_source(
-            signal, _source(spec, scan, {"mca": index}, conversions)
+        selection = {"mca": device, "y": ylabel if ylabel == x else "point"}
+        _finish(image, _source(spec, scan, selection, conversions), metadata)
+        images.append(image)
+    return images
+
+
+@dataclasses.dataclass(frozen=True)
+class MeshShape:
+    """Grid of a mesh scan, as given by its command.
+
+    Args:
+        columns: number of points along the first motor (fastest)
+        rows: number of points along the second motor
+        steps: steps of the first and second motors
+    """
+
+    columns: int
+    rows: int
+    steps: tuple[float, float]
+
+
+def mesh_shape(info: SpecScanInfo) -> MeshShape | None:
+    """Return the grid of a mesh scan, or None if the scan is not a mesh scan.
+
+    Mesh scans are written by ``mesh`` and ``dmesh`` commands:
+    ``mesh <motor1> <start1> <end1> <intervals1> <motor2> <start2> <end2>
+    <intervals2> <time>``, the first motor moving fastest; their first two
+    columns hold the positions of the two motors.
+    """
+    words = info.command.split()
+    if len(words) < 9 or words[0] not in ("mesh", "dmesh") or len(info.labels) < 2:
+        return None
+    try:
+        start1, end1, count1 = float(words[2]), float(words[3]), int(words[4])
+        start2, end2, count2 = float(words[6]), float(words[7]), int(words[8])
+    except ValueError:
+        return None
+    if count1 < 0 or count2 < 0:
+        return None
+    steps = (
+        (end1 - start1) / count1 if count1 else 1.0,
+        (end2 - start2) / count2 if count2 else 1.0,
+    )
+    if 0.0 in steps:
+        return None
+    return MeshShape(count1 + 1, count2 + 1, steps)
+
+
+def mesh_images(
+    spec: SpecFile, scan: SpecScan, counters: Sequence[str]
+) -> list[ImageObj]:
+    """Return one image per counter of a mesh scan.
+
+    Coordinates start at the motor positions of the first point and follow the
+    steps of the command. Points missing in an interrupted scan are NaN.
+
+    Raises:
+        ValueError: if the scan is not a mesh scan, has no data, or has no column
+         of a counter
+    """
+    shape = mesh_shape(scan.info)
+    if shape is None:
+        raise ValueError(f"Scan {scan.info.key} is not a mesh scan")
+    size = shape.rows * shape.columns
+    count = min(scan.data.shape[0], size)
+    if count == 0:
+        raise ValueError(f"Scan {scan.info.key} has no data")
+    xlabel, ylabel = scan.info.labels[:2]
+    xvals = scan.data[0, 0] + shape.steps[0] * np.arange(shape.columns)
+    yvals = scan.data[0, 1] + shape.steps[1] * np.arange(shape.rows)
+    notes = [
+        f"points -> {shape.rows} x {shape.columns} image ('{xlabel}' along rows), "
+        "coordinates from the first point and the command steps"
+    ]
+    if count < size:
+        notes.append(f"incomplete mesh: {size - count} points set to NaN")
+    if scan.data.shape[0] > size:
+        notes.append(f"{scan.data.shape[0] - size} points beyond the mesh ignored")
+    metadata = scan_metadata(scan)
+    images = []
+    for counter in counters:
+        grid = np.full(size, np.nan)
+        grid[:count] = scan.column(counter)[:count]
+        conversions = list(notes)
+        image = _image(
+            f"{counter} (scan {scan.info.key})",
+            grid.reshape(shape.rows, shape.columns),
+            (xvals, yvals),
+            (xlabel, ylabel, counter),
+            conversions,
         )
-        signals.append(signal)
-    return signals
+        selection = {"x": xlabel, "y": ylabel, "z": counter}
+        _finish(image, _source(spec, scan, selection, conversions), metadata)
+        images.append(image)
+    return images
 
 
 @dataclasses.dataclass(frozen=True)
 class ScanGroup:
-    """Signals read from one scan, imported in a group of their own."""
+    """Signals and images read from one scan, imported in groups of their own."""
 
     title: str
     signals: tuple[SignalObj, ...]
+    images: tuple[ImageObj, ...] = ()
 
 
 @dataclasses.dataclass(frozen=True)
@@ -126,15 +368,15 @@ class SkippedScan:
 
 @dataclasses.dataclass(frozen=True)
 class ScanImport:
-    """Signals to import, one group per scan, and the scans that were skipped."""
+    """Objects to import, one group per scan, and the scans that were skipped."""
 
     groups: tuple[ScanGroup, ...]
     skipped: tuple[SkippedScan, ...]
 
     @property
-    def signal_count(self) -> int:
-        """Return the number of signals to import."""
-        return sum(len(group.signals) for group in self.groups)
+    def object_count(self) -> int:
+        """Return the number of signals and images to import."""
+        return sum(len(group.signals) + len(group.images) for group in self.groups)
 
 
 def _scan_list(keys: Sequence[str], max_keys: int) -> str:
@@ -205,40 +447,74 @@ def select_scans(spec: SpecFile, text: str) -> list[str]:
     return [info.key for info in spec.scans if info.key in selected]
 
 
-def check_scan_selection(x: str, counters: Sequence[str], include_mca: bool) -> None:
-    """Raise if neither a counter other than X nor the MCA spectra are selected."""
-    if not [counter for counter in counters if counter != x] and not include_mca:
-        raise ValueError("Select at least one counter or the MCA spectra")
+def check_scan_selection(
+    x: str, counters: Sequence[str], mca_devices: Sequence[str] = ()
+) -> None:
+    """Raise if neither a counter other than X nor an MCA device is selected."""
+    if not [counter for counter in counters if counter != x] and not mca_devices:
+        raise ValueError("Select at least one counter or MCA device")
 
 
-def import_scan(
+def _scan_objects(
     spec: SpecFile,
-    key: str,
+    scan: SpecScan,
     x: str,
     counters: Sequence[str],
-    include_mca: bool = False,
-) -> tuple[ScanGroup | None, SkippedScan | None]:
-    """Return the signals of one scan, and why its columns were left out, if so.
-
-    MCA spectra are imported even if columns are missing.
-    """
-    counters = [counter for counter in counters if counter != x]
-    scan = spec.read_scan(key)
+    mca_devices: Sequence[str],
+    mesh_as_images: bool,
+) -> tuple[list[SignalObj], list[ImageObj], SkippedScan | None]:
+    """Return the signals and images of a scan, and why its columns were left out,
+    if so."""
+    key = scan.info.key
     signals: list[SignalObj] = []
+    images: list[ImageObj] = []
     skipped = None
-    missing = [name for name in (x, *counters) if name not in scan.info.labels]
+    mesh = mesh_as_images and mesh_shape(scan.info) is not None
+    needed = counters if mesh else (x, *counters)
+    missing = [name for name in needed if name not in scan.info.labels]
     if counters and missing:
         skipped = SkippedScan(key, f"no column {', '.join(missing)}")
     elif counters and scan.data.shape[0] == 0:
         skipped = SkippedScan(key, "no data")
+    elif counters and mesh:
+        images.extend(mesh_images(spec, scan, counters))
     elif counters:
         signals.extend(scan_signals(spec, scan, x, counters))
-    if include_mca:
-        signals.extend(mca_signals(spec, scan))
-    if not signals:
+    devices = [device for device in mca_devices if device in scan.mca]
+    if devices:
+        images.extend(mca_images(spec, scan, x, devices))
+    return signals, images, skipped
+
+
+def import_scan(
+    spec: SpecFile,
+    key: str,
+    x: str,
+    counters: Sequence[str],
+    mca_devices: Sequence[str] = (),
+    mesh_as_images: bool = True,
+) -> tuple[ScanGroup | None, SkippedScan | None]:
+    """Return the signals and images of one scan, and why its columns were left
+    out, if so.
+
+    Counters are imported as signals versus X, or as images for mesh scans if
+    ``mesh_as_images`` is True. MCA spectra of the selected devices are imported
+    as images, even if columns are missing. A scan that cannot be read is
+    skipped, with the error.
+    """
+    counters = [counter for counter in counters if counter != x]
+    try:
+        scan = spec.read_scan(key)
+        signals, images, skipped = _scan_objects(
+            spec, scan, x, counters, mca_devices, mesh_as_images
+        )
+    except Exception as exc:  # pylint: disable=broad-except
+        # Data of third-party files: report the scan and read the other ones
+        return None, SkippedScan(key, f"unreadable: {exc}")
+    if not signals and not images:
         return None, skipped
     title = f"Scan {key} - {scan.info.command}".strip(" -")
-    return ScanGroup(title, tuple(signals)), skipped
+    return ScanGroup(title, tuple(signals), tuple(images)), skipped
 
 
 def plan_scan_import(
@@ -246,29 +522,29 @@ def plan_scan_import(
     keys: Sequence[str],
     x: str,
     counters: Sequence[str],
-    include_mca: bool = False,
+    mca_devices: Sequence[str] = (),
+    mesh_as_images: bool = True,
 ) -> ScanImport:
-    """Return the signals to import from scans, one group per scan.
+    """Return the objects to import from scans, one group per scan.
 
     Scans of the same structure are never merged: each scan is its own group.
-    Scans lacking a selected column are skipped, with the reason.
+    Scans lacking a selected column, or that cannot be read, are skipped, with
+    the reason.
 
     Raises:
         ValueError: if nothing is selected for import
     """
-    check_scan_selection(x, counters, include_mca)
+    check_scan_selection(x, counters, mca_devices)
     groups: list[ScanGroup] = []
     skipped: list[SkippedScan] = []
     for key in keys:
-        group, reason = import_scan(spec, key, x, counters, include_mca)
+        group, reason = import_scan(spec, key, x, counters, mca_devices, mesh_as_images)
         if group is not None:
             groups.append(group)
         if reason is not None:
             skipped.append(reason)
     if not groups:
-        raise ValueError(
-            "No signal to import:\n" + "\n".join(summarize_skipped(skipped))
-        )
+        raise ValueError("Nothing to import:\n" + "\n".join(summarize_skipped(skipped)))
     return ScanImport(tuple(groups), tuple(skipped))
 
 
@@ -283,10 +559,83 @@ def plan_scan_import(
     "start_time": "Scan.start_time",
 }
 
+#: Units of monochromator angles, with their conversion to radians
+_ANGLE_UNITS = {
+    "": np.deg2rad,
+    "deg": np.deg2rad,
+    "degree": np.deg2rad,
+    "degrees": np.deg2rad,
+    "rad": np.asarray,
+    "radian": np.asarray,
+    "radians": np.asarray,
+}
+
+
+def xdi_energy(xdi: XdiFile) -> tuple[np.ndarray, XdiColumn, list[str]]:
+    """Return the abscissa of an XDI file, its column, and the conversions applied.
+
+    Monochromator angles (``angle`` column, in degrees unless given in radians)
+    are converted to energies in eV with the Bragg law, ``E = hc / (2 d sin)``,
+    if the file gives the ``Mono.d_spacing`` lattice spacing in Å. Other
+    abscissas are returned as written.
+    """
+    column = xdi.columns[0]
+    values = xdi.data[:, 0].copy()
+    to_radians = _ANGLE_UNITS.get(column.units.lower())
+    if column.name.lower() != "angle" or to_radians is None:
+        return values, column, []
+    try:
+        spacing = float(xdi.field("Mono.d_spacing").split()[0])
+    except (IndexError, ValueError):
+        return values, column, []
+    sines = np.sin(to_radians(values))
+    if spacing <= 0 or not np.all(sines > 0):
+        return values, column, []
+    energies = HC_EV_ANGSTROM / (2 * spacing * sines)
+    conversion = (
+        f"angle -> energy: E = hc / (2 d sin(angle)), "
+        f"d = {spacing} Å, hc = {HC_EV_ANGSTROM} eV.Å"
+    )
+    return energies, XdiColumn("energy", "eV"), [conversion]
+
+
+def xdi_metadata(xdi: XdiFile) -> dict[str, str]:
+    """Return the header of an XDI file kept as object metadata.
+
+    Keys: every header field (``Namespace.tag``, as written), ``XDI version``
+    (with the application versions), ``XDI comments`` (one comment per line) and
+    ``XDI problems`` (ignored header lines, one per line), if any.
+    """
+    metadata = dict(xdi.fields)
+    metadata["XDI version"] = f"XDI/{xdi.version} {xdi.applications}".strip()
+    if xdi.comments:
+        metadata["XDI comments"] = "\n".join(xdi.comments)
+    if xdi.problems:
+        metadata["XDI problems"] = "\n".join(xdi.problems)
+    return metadata
+
+
+def _outer_blocks(xdi: XdiFile) -> list[tuple[float | None, slice]]:
+    """Return the outer value and rows of each block of an XDI file (one block
+    without outer value for one-dimensional data)."""
+    if not xdi.outer:
+        return [(None, slice(None))]
+    stops = [first for _value, first in xdi.outer[1:]] + [xdi.data.shape[0]]
+    return [
+        (value, slice(first, stop))
+        for (value, first), stop in zip(xdi.outer, stops)
+        if stop > first
+    ]
+
 
 def xdi_signals(xdi: XdiFile, columns: Sequence[str] | None = None) -> list[SignalObj]:
     """Return one signal per column of an XDI file, versus the first column.
 
+    Monochromator angles are converted to energies (see :func:`xdi_energy`). For
+    two-dimensional data, each column gives one signal per block of the outer
+    scan, its outer value being recorded in the title, the metadata (``XDI outer
+    value``) and the origin.
+
     Args:
         xdi: XDI file
         columns: column names (default: all columns but the first one)
@@ -294,30 +643,41 @@ def xdi_signals(xdi: XdiFile, columns: Sequence[str] | None = None) -> list[Sign
     Raises:
         KeyError: if a column does not exist
     """
-    xcol = xdi.columns[0]
+    xvalues, xcol, conversions = xdi_energy(xdi)
     if columns is None:
         columns = [column.name for column in xdi.columns[1:]]
     details = {key: xdi.field(name) for key, name in _XDI_DETAILS.items()}
     details["element"], details["edge"] = xdi.element, xdi.edge
     details = {key: value for key, value in details.items() if value}
-    if xdi.skipped_lines:
-        details["skipped_lines"] = len(xdi.skipped_lines)
+    metadata = xdi_metadata(xdi)
+    outer_name = xdi.field("Outer.name") or "outer"
+    filename = PurePath(xdi.path).name
     signals = []
     for name in columns:
         column = xdi.columns[xdi.column_index(name)]
-        signal = create_signal(
-            f"{column.name} ({PurePath(xdi.path).name})",
-            xdi.data[:, 0].copy(),
-            xdi.column(name).copy(),
-            units=(xcol.units, column.units),
-            labels=(xcol.name, column.name),
-        )
-        source = make_experimental_source(
-            "xdi",
-            xdi.path,
-            selection={"x": xcol.name, "y": column.name},
-            details=details or None,
-        )
-        set_experimental_source(signal, source)
-        signals.append(signal)
+        for outer, rows in _outer_blocks(xdi):
+            title = f"{column.name} ({filename})"
+            selection = {"x": xdi.columns[0].name, "y": column.name}
+            block_metadata = dict(metadata)
+            if outer is not None:
+                title = f"{column.name} ({filename}, {outer_name} = {outer:g})"
+                if not np.isnan(outer):
+                    selection["outer"] = outer
+                    block_metadata["XDI outer value"] = outer
+            signal = create_signal(
+                title,
+                xvalues[rows].copy(),
+                xdi.column(name)[rows].copy(),
+                units=(xcol.units, column.units),
+                labels=(xcol.name, column.name),
+            )
+            source = make_experimental_source(
+                "xdi",
+                xdi.path,
+                selection=selection,
+                conversions=conversions or None,
+                details=details or None,
+            )
+            _finish(signal, source, block_metadata)
+            signals.append(signal)
     return signals
diff --git a/src/datalab_synchrotron/core/spec.py b/src/datalab_synchrotron/core/spec.py
index 7145fd1..e1793e0 100644
--- a/src/datalab_synchrotron/core/spec.py
+++ b/src/datalab_synchrotron/core/spec.py
@@ -6,6 +6,11 @@
 and, for MCA scans, ``@A`` spectrum lines (continued with ``\\``). File header
 lines (``#F``, ``#E``, ``#O`` motor names...) apply to the scans that follow.
 
+Several MCA devices may write spectra at each point: their lines start with
+``@A1``, ``@A2``..., and their ``#@CALIB``/``#@CHANN`` lines may end with the
+device name (``mca1``...). Spectra are grouped by device, named ``mca`` for
+``@A`` lines and ``mca<n>`` for ``@A<n>`` lines.
+
 The same scan number may appear several times in a file: scans are identified
 by ``"<number>.<occurrence>"`` (e.g. ``"12.1"``, ``"12.2"``). Opening a file
 only indexes its scans; the data of a scan is read when the scan is read.
@@ -14,17 +19,23 @@
 from __future__ import annotations
 
 import dataclasses
+import math
 import re
 from pathlib import Path
 
 import numpy as np
 
-__all__ = ["SpecFile", "SpecScan", "SpecScanInfo", "is_spec_file"]
+__all__ = ["SpecFile", "SpecScan", "SpecScanInfo", "is_spec_file", "mca_device"]
 
 #: Number of bytes inspected to recognize a SPEC file
 SNIFF_SIZE = 65536
 
 _SPLIT_LABELS = re.compile(r"\s{2,}")
+_MCA_LINE = re.compile(r"@A(\d*)(?=\s|\\|$)")
+_POSITIONS = re.compile(r"#P\d+(?:\s+(.*))?$")
+_MOTORS = re.compile(r"#O\d+(?:\s+(.*))?$")
+#: Values written for missing data by some acquisition programs (e.g. Bluesky)
+_MISSING_VALUES = ("none", "null")
 
 
 def is_spec_file(path: str | Path) -> bool:
@@ -43,6 +54,15 @@ def is_spec_file(path: str | Path) -> bool:
     return stripped.startswith("#") and re.search(r"^#S \d+", text, re.M) is not None
 
 
+def mca_device(suffix: str) -> str:
+    """Return the name of the MCA device of ``@A<suffix>`` lines.
+
+    Args:
+        suffix: digits following ``@A`` (empty for ``@A`` lines)
+    """
+    return f"mca{suffix}"
+
+
 @dataclasses.dataclass(frozen=True)
 class SpecScanInfo:
     """Scan of a SPEC file, as indexed when the file is opened.
@@ -52,9 +72,11 @@ class SpecScanInfo:
         occurrence: occurrence of the scan number in the file (from 1)
         command: scan command (e.g. ``ascan th 0 1 10 0.1``)
         date: ``#D`` date of the scan
-        labels: column labels
+        labels: column labels, one per column (``column<n>`` if not given,
+         ``<label>_<n>`` for the n-th repetition of a label)
         point_count: number of data lines
-        mca_count: number of MCA spectra
+        mca_count: number of MCA spectra, all devices together
+        mca_devices: MCA devices, in order of appearance
     """
 
     number: int
@@ -64,6 +86,7 @@ class SpecScanInfo:
     labels: tuple[str, ...]
     point_count: int
     mca_count: int
+    mca_devices: tuple[str, ...] = ()
 
     @property
     def key(self) -> str:
@@ -77,23 +100,28 @@ class SpecScan:
 
     Args:
         info: scan index entry
-        data: data points, one column per label (incomplete lines are dropped)
+        data: data points, one column per label (incomplete lines are dropped,
+         missing values are NaN)
         motors: motor positions at the start of the scan (``#O``/``#P``)
         header: scan header lines
-        mca: MCA spectra, in acquisition order
-        mca_calibration: ``#@CALIB`` coefficients ``(a, b, c)``, if any
-        mca_channels: ``#@CHANN`` values ``(count, first, last, reduction)``, if any
+        mca: MCA spectra of each device, in acquisition order
+        mca_calibration: ``#@CALIB`` coefficients ``(a, b, c)`` by device, the
+         empty name standing for the calibration of all devices
+        mca_channels: ``#@CHANN`` values ``(count, first, last, reduction)`` by
+         device, the empty name standing for all devices
         problems: lines that could not be read as data, with their reason
+        ignored: number of ignored ``@`` lines that are not MCA spectra, by prefix
     """
 
     info: SpecScanInfo
     data: np.ndarray
     motors: dict[str, float]
     header: tuple[str, ...]
-    mca: tuple[np.ndarray, ...]
-    mca_calibration: tuple[float, float, float] | None
-    mca_channels: tuple[int, int, int, int] | None
+    mca: dict[str, tuple[np.ndarray, ...]]
+    mca_calibration: dict[str, tuple[float, float, float]]
+    mca_channels: dict[str, tuple[int, int, int, int]]
     problems: tuple[str, ...]
+    ignored: dict[str, int] = dataclasses.field(default_factory=dict)
 
     def column(self, label: str) -> np.ndarray:
         """Return the values of a column.
@@ -109,12 +137,27 @@ def column(self, label: str) -> np.ndarray:
                 f"(available: {', '.join(self.info.labels)})"
             ) from exc
 
-    def mca_channels_axis(self, index: int) -> np.ndarray:
-        """Return the channel numbers of an MCA spectrum."""
-        size = self.mca[index].size
-        if self.mca_channels is None:
+    def calibration(self, device: str) -> tuple[float, float, float] | None:
+        """Return the ``#@CALIB`` coefficients ``(a, b, c)`` of an MCA device."""
+        return self.mca_calibration.get(device, self.mca_calibration.get(""))
+
+    def channel_numbers(self, device: str) -> np.ndarray:
+        """Return the channel numbers of the spectra of an MCA device.
+
+        Raises:
+            ValueError: if the device has no spectrum, or spectra of several sizes
+        """
+        sizes = {spectrum.size for spectrum in self.mca.get(device, ())}
+        if len(sizes) != 1:
+            raise ValueError(
+                f"Scan {self.info.key}: MCA device '{device}' has "
+                + ("no spectrum" if not sizes else "spectra of several sizes")
+            )
+        size = sizes.pop()
+        channels = self.mca_channels.get(device, self.mca_channels.get(""))
+        if channels is None:
             return np.arange(size, dtype=float)
-        _count, first, _last, reduction = self.mca_channels
+        _count, first, _last, reduction = channels
         return first + reduction * np.arange(size, dtype=float)
 
 
@@ -132,6 +175,72 @@ def _numbers(text: str) -> list[float]:
     return [float(value) for value in text.split()]
 
 
+def _values(text: str) -> list[float]:
+    """Return the values of a data line, missing values being NaN.
+
+    Raises:
+        ValueError: if a word is neither a number nor a missing value
+    """
+    values = []
+    for word in text.split():
+        try:
+            values.append(float(word))
+        except ValueError:
+            if word.lower() not in _MISSING_VALUES:
+                raise
+            values.append(math.nan)
+    return values
+
+
+def _unique(labels: list[str]) -> tuple[str, ...]:
+    """Return labels with a ``_<n>`` suffix added to repeated ones, as spec2nexus
+    does, so that each column has its own label."""
+    result: list[str] = []
+    for label in labels:
+        name, index = label, 0
+        while name in result:
+            index += 1
+            name = f"{label}_{index}"
+        result.append(name)
+    return tuple(result)
+
+
+def _labels(text: str, count: int | None, width: int) -> tuple[str, ...]:
+    """Return one label per column.
+
+    Labels are separated by two spaces or more, or by single spaces if this gives
+    the column count: the ``#N`` count, else the number of values of the first
+    data line (some programs write a wrong ``#N``). Columns without label are
+    named ``column<n>`` (the split giving the most labels is then used), and
+    repeated labels get a ``_<n>`` suffix.
+
+    Args:
+        text: ``#L`` line content
+        count: ``#N`` column count, if given
+        width: number of values of the first data line (0: no data)
+    """
+    spaced = _SPLIT_LABELS.split(text.strip()) if text.strip() else []
+    words = text.split()
+    for expected in (count, width):
+        if expected:
+            for labels in (spaced, words):
+                if len(labels) == expected:
+                    return _unique(labels)
+    expected = width or count or len(spaced)
+    # More labels than the double-space split, without exceeding the columns
+    base = words if len(spaced) < len(words) <= expected else spaced
+    labels = base + [f"column{index + 1}" for index in range(len(base), expected)]
+    return _unique(labels[:expected])
+
+
+def _device_values(text: str) -> tuple[list[float], str]:
+    """Return the numbers of an MCA header line, and its trailing device name."""
+    words = text.split()
+    if words and not re.fullmatch(r"[-+0-9.eE]+", words[-1]):
+        return _numbers(" ".join(words[:-1])), words[-1]
+    return _numbers(text), ""
+
+
 class SpecFile:
     """SPEC file, indexed when opened.
 
@@ -170,9 +279,10 @@ def close(stop: int) -> None:
                 occurrence=occurrences[number],
                 command=scan["command"],
                 date=scan["date"],
-                labels=scan["labels"],
+                labels=_labels(scan["labels"], scan["count"], scan["width"]),
                 point_count=scan["points"],
-                mca_count=scan["mca"],
+                mca_count=sum(scan["mca"].values()),
+                mca_devices=tuple(scan["mca"]),
             )
             self._sections[info.key] = _Section(scan["start"], stop, scan["header"])
             infos.append(info)
@@ -195,9 +305,11 @@ def close(stop: int) -> None:
                     "number": number,
                     "command": fields[1] if len(fields) > 1 else "",
                     "date": "",
-                    "labels": (),
+                    "labels": "",
+                    "count": None,
+                    "width": 0,
                     "points": 0,
-                    "mca": 0,
+                    "mca": {},
                     "start": index,
                     "header": tuple(file_header),
                 }
@@ -209,13 +321,23 @@ def close(stop: int) -> None:
                 if line.startswith("#"):
                     file_header.append(line)
             elif line.startswith("#L "):
-                scan["labels"] = tuple(_SPLIT_LABELS.split(line[3:].strip()))
+                scan["labels"] = line[3:]
+            elif line.startswith("#N "):
+                try:
+                    scan["count"] = int(line[3:].split()[0])
+                except (IndexError, ValueError):
+                    pass
             elif line.startswith("#D "):
                 scan["date"] = line[3:].strip()
-            elif stripped.startswith("@A"):
-                scan["mca"] += 1
+            elif stripped.startswith("@"):
+                match = _MCA_LINE.match(stripped)
+                if match is not None:
+                    device = mca_device(match.group(1))
+                    scan["mca"][device] = scan["mca"].get(device, 0) + 1
                 continued = stripped.endswith("\\")
-            elif stripped and not stripped.startswith(("#", "@")):
+            elif stripped and not stripped.startswith("#"):
+                if not scan["points"]:
+                    scan["width"] = len(stripped.split())
                 scan["points"] += 1
         close(len(self._lines))
         return tuple(infos)
@@ -246,8 +368,10 @@ def read_scan(self, key: str) -> SpecScan:
         header: list[str] = [self._lines[section.start]]
         rows: list[list[float]] = []
         problems: list[str] = []
-        mca: list[np.ndarray] = []
-        calibration = channels = None
+        mca: dict[str, list[np.ndarray]] = {}
+        calibration: dict[str, tuple[float, float, float]] = {}
+        channels: dict[str, tuple[int, int, int, int]] = {}
+        ignored: dict[str, int] = {}
         positions: list[float] = []
         index = 0
         ncols = len(info.labels)
@@ -259,25 +383,37 @@ def read_scan(self, key: str) -> SpecScan:
                 continue
             if stripped.startswith("#"):
                 header.append(line)
-                if stripped.startswith("#@CALIB"):
-                    values = _numbers(stripped[7:])
-                    calibration = tuple((values + [0.0, 0.0, 0.0])[:3])
-                elif stripped.startswith("#@CHANN"):
-                    values = _numbers(stripped[7:])
+                lowered = stripped.lower()
+                if lowered.startswith("#@calib"):
+                    values, device = _device_values(stripped[7:])
+                    calibration[device] = tuple((values + [0.0, 0.0, 0.0])[:3])
+                elif lowered.startswith("#@chann"):
+                    values, device = _device_values(stripped[7:])
                     if len(values) == 4:
-                        channels = tuple(int(value) for value in values)
-                elif re.match(r"#P\d+ ", stripped):
-                    positions.extend(_numbers(stripped.split(maxsplit=1)[1]))
+                        channels[device] = tuple(int(value) for value in values)
+                else:
+                    match = _POSITIONS.match(stripped)
+                    if match is not None and match.group(1):
+                        positions.extend(_numbers(match.group(1)))
                 continue
-            if stripped.startswith("@A"):
-                text = stripped[2:]
+            if stripped.startswith("@"):
+                text = stripped
                 while text.endswith("\\") and index < len(lines):
                     text = text[:-1] + " " + lines[index].strip()
                     index += 1
-                mca.append(np.array(_numbers(text.rstrip("\\"))))
+                text = text.rstrip("\\")
+                match = _MCA_LINE.match(text)
+                if match is None:
+                    prefix = text.split(maxsplit=1)[0]
+                    ignored[prefix] = ignored.get(prefix, 0) + 1
+                    continue
+                device = mca_device(match.group(1))
+                mca.setdefault(device, []).append(
+                    np.array(_numbers(text[match.end() :]))
+                )
                 continue
             try:
-                values = _numbers(stripped)
+                values = _values(stripped)
             except ValueError:
                 problems.append(f"line '{stripped[:40]}': not numeric")
                 continue
@@ -287,21 +423,21 @@ def read_scan(self, key: str) -> SpecScan:
                 )
                 continue
             rows.append(values)
-        data = np.array(rows, dtype=float).reshape(len(rows), ncols or 0)
-        motor_names = [
-            name
-            for line in section.file_header
-            if re.match(r"#O\d+ ", line)
-            for name in _SPLIT_LABELS.split(line.split(maxsplit=1)[1].strip())
-        ]
+        data = np.array(rows, dtype=float).reshape(len(rows), ncols)
+        motor_names = []
+        for line in section.file_header:
+            match = _MOTORS.match(line.rstrip())
+            if match is not None and match.group(1):
+                motor_names.extend(_SPLIT_LABELS.split(match.group(1).strip()))
         motors = dict(zip(motor_names, positions))
         return SpecScan(
             info=info,
             data=data,
             motors=motors,
             header=tuple(header),
-            mca=tuple(mca),
+            mca={device: tuple(spectra) for device, spectra in mca.items()},
             mca_calibration=calibration,
             mca_channels=channels,
             problems=tuple(problems),
+            ignored=ignored,
         )
diff --git a/src/datalab_synchrotron/core/xdi.py b/src/datalab_synchrotron/core/xdi.py
index 9da66b4..1f71d7e 100644
--- a/src/datalab_synchrotron/core/xdi.py
+++ b/src/datalab_synchrotron/core/xdi.py
@@ -1,15 +1,29 @@
 """Reader of XDI files (XAS Data Interchange format, versions 1.x).
 
-An XDI file holds one X-ray absorption scan as text: ``#``-prefixed header fields
-``Namespace.tag: value`` (columns, element and edge, beamline, sample...), user
-comments after ``# ///``, a ``#----`` line, then whitespace-separated data
-columns. Field names are case-insensitive. Values often carry an EPICS process
-variable after ``||``, which is kept apart.
+An XDI file holds one X-ray absorption scan as text: a version line
+(``# XDI/1.0``, possibly followed by application versions), ``#``-prefixed
+header fields ``Namespace.tag: value`` (columns, element and edge, beamline,
+sample...), user comments after a ``# ///`` line, a ``#----`` header-end line,
+an optional column label line, then whitespace-separated data columns. Field
+names are case-insensitive, the last occurrence of a field being used. Values
+often carry an EPICS process variable after ``||``, which is kept apart from
+column names. Free text may be UTF-8; files that are not are read as Latin-1.
+
+Files are read as the reference XDI library does: data lines that are not
+numbers, hold NaN or infinite values, or whose value count differs from the
+first data line are refused, with their line number. Header lines that are not
+valid fields (no value, no ``:``, name not of the ``Namespace.tag`` form) and
+header lines starting with another character than ``#`` are recorded as
+problems and otherwise ignored. ``#`` lines of the data section are ignored,
+except ``# Outer.value: <value>`` lines, which start a block of points measured
+at another value of an outer scan (two-dimensional data, ``Outer.name`` naming
+the outer scan).
 """
 
 from __future__ import annotations
 
 import dataclasses
+import math
 import re
 from pathlib import Path
 
@@ -17,8 +31,8 @@
 
 __all__ = ["XdiColumn", "XdiFile", "is_xdi_file", "read_xdi"]
 
-_VERSION = re.compile(r"^#\s*XDI/(\d+\.\d+)", re.IGNORECASE)
-_FIELD = re.compile(r"^#\s*([A-Za-z][\w-]*)\.([\w-]+)\s*:\s?(.*)$")
+_VERSION = re.compile(r"^#\s*XDI/(\d+\.\d+)(.*)$", re.IGNORECASE)
+_FIELD = re.compile(r"^([A-Za-z][\w-]*)\.([\w-]+)\s*:\s?(.*)$")
 
 
 @dataclasses.dataclass(frozen=True)
@@ -45,7 +59,12 @@ class XdiFile:
         comments: user comment lines
         columns: data columns
         data: data values, one row per point
-        skipped_lines: numbers of the data lines without a value per column
+        applications: versions of the applications that wrote the file, as
+         written after the XDI version (e.g. ``"GSE/1.0"``)
+        problems: header lines that were ignored, with their line number and
+         reason
+        outer: blocks of an outer scan, as ``(outer value, first row)``, in row
+         order (empty for one-dimensional data); the value is NaN if not given
     """
 
     path: str
@@ -54,7 +73,9 @@ class XdiFile:
     comments: tuple[str, ...]
     columns: tuple[XdiColumn, ...]
     data: np.ndarray
-    skipped_lines: tuple[int, ...] = ()
+    applications: str = ""
+    problems: tuple[str, ...] = ()
+    outer: tuple[tuple[float, int], ...] = ()
 
     def field(self, name: str, default: str = "") -> str:
         """Return a header field value, by case-insensitive ``Namespace.tag`` name."""
@@ -91,13 +112,22 @@ def edge(self) -> str:
         return self.field("Element.edge") or self.field("Scan.edge")
 
 
+def _decode(raw: bytes) -> str:
+    """Return the text of a file: UTF-8, or Latin-1 for older files."""
+    try:
+        return raw.decode("utf-8-sig")
+    except UnicodeDecodeError:
+        return raw.decode("latin-1")
+
+
 def is_xdi_file(path: str | Path) -> bool:
     """Return True if the file starts with an XDI version line."""
     try:
-        with open(path, encoding="latin-1") as fdesc:
-            return bool(_VERSION.match(fdesc.readline()))
-    except (OSError, UnicodeDecodeError):
+        with open(path, "rb") as fdesc:
+            first = _decode(fdesc.readline()).strip()
+    except OSError:
         return False
+    return bool(_VERSION.match(first))
 
 
 def _column(value: str) -> XdiColumn:
@@ -108,6 +138,65 @@ def _column(value: str) -> XdiColumn:
     return XdiColumn(words[0], words[1] if len(words) > 1 else "")
 
 
+def _is_number(word: str) -> bool:
+    """Return True if a word is a number."""
+    try:
+        float(word)
+    except ValueError:
+        return False
+    return True
+
+
+def _data_values(text: str, where: str) -> list[float]:
+    """Return the values of a data line.
+
+    Raises:
+        ValueError: if a value is not a finite number
+    """
+    values = []
+    for word in text.split():
+        try:
+            value = float(word)
+        except ValueError as exc:
+            raise ValueError(f"{where}: '{word}' is not a number") from exc
+        if not math.isfinite(value):
+            raise ValueError(f"{where}: '{word}' is not a finite number")
+        values.append(value)
+    return values
+
+
+def _outer_value(text: str, where: str) -> float:
+    """Return the value of an ``Outer.value`` field.
+
+    Raises:
+        ValueError: if the value is not a number
+    """
+    try:
+        return float(text.split()[0])
+    except (IndexError, ValueError) as exc:
+        raise ValueError(f"{where}: outer value '{text}' is not a number") from exc
+
+
+class _Fields:
+    """Header fields, case-insensitive, the last occurrence of a field winning."""
+
+    def __init__(self) -> None:
+        self.values: dict[str, str] = {}
+
+    def set(self, name: str, value: str) -> None:
+        """Set a field, replacing an earlier occurrence written in another case."""
+        for key in [key for key in self.values if key.lower() == name.lower()]:
+            del self.values[key]
+        self.values[name] = value
+
+    def get(self, name: str) -> str:
+        """Return a field value by case-insensitive name (empty if not given)."""
+        return next(
+            (value for key, value in self.values.items() if key.lower() == name),
+            "",
+        )
+
+
 def read_xdi(path: str | Path) -> XdiFile:
     """Read an XDI file.
 
@@ -115,54 +204,85 @@ def read_xdi(path: str | Path) -> XdiFile:
         path: file path
 
     Returns:
-        File content; data lines without a value per column are skipped and
-        their numbers recorded
+        File content
 
     Raises:
-        ValueError: if the file is not an XDI file or has no data
+        ValueError: if the file is not an XDI file, has no data, or has an invalid
+         data line
     """
-    lines = Path(path).read_text(encoding="latin-1").splitlines()
-    match = _VERSION.match(lines[0]) if lines else None
+    name = Path(path).name
+    lines = _decode(Path(path).read_bytes()).splitlines()
+    match = _VERSION.match(lines[0].strip()) if lines else None
     if match is None:
         raise ValueError(f"'{path}' is not an XDI file (no XDI version line)")
-    fields: dict[str, str] = {}
+    fields = _Fields()
     comments: list[str] = []
     numbered: dict[int, XdiColumn] = {}
-    in_comments, last_header = False, ""
+    problems: list[str] = []
+    # Header sections, in file order, before the data section
+    section, label_line = "fields", ""
     rows: list[list[float]] = []
-    skipped: list[int] = []
+    outer: list[tuple[float, int]] = []
     for number, line in enumerate(lines[1:], start=2):
         stripped = line.strip()
         if not stripped:
             continue
-        if stripped.startswith("#"):
-            text = stripped[1:].strip()
-            if text.startswith("///"):
-                in_comments = True
-            elif text.startswith("---"):
-                in_comments = False
-            elif in_comments:
-                comments.append(text)
-            else:
-                field = _FIELD.match(stripped)
-                if field is not None:
-                    name = f"{field.group(1)}.{field.group(2)}"
-                    fields[name] = field.group(3).strip()
-                    if field.group(1).lower() == "column" and field.group(2).isdigit():
-                        numbered[int(field.group(2))] = _column(field.group(3))
-            last_header = text
+        if section == "data" and stripped.startswith("#"):
+            field = _FIELD.match(stripped[1:].strip())
+            if field is not None and (
+                f"{field.group(1)}.{field.group(2)}".lower() == "outer.value"
+            ):
+                where = f"'{name}', line {number}"
+                outer.append((_outer_value(field.group(3), where), len(rows)))
             continue
-        try:
-            values = [float(word) for word in stripped.split()]
-        except ValueError:
-            skipped.append(number)
+        if section != "data" and stripped.startswith("#"):
+            body = line.lstrip()[1:].rstrip()
+            text = body.strip()
+            if section == "fields" and text.startswith("///"):
+                section = "comments"
+            elif text.startswith("---"):
+                section = "labels"
+            elif section == "comments":
+                comments.append(body[1:] if body.startswith(" ") else body)
+            elif section == "labels":
+                label_line = text
+            elif text:
+                field = _FIELD.match(text)
+                if field is None:
+                    problems.append(
+                        f"line {number}: not a 'Namespace.tag: value' field"
+                    )
+                elif not field.group(3).strip():
+                    problems.append(f"line {number}: field without value")
+                else:
+                    namespace, tag = field.group(1), field.group(2)
+                    fields.set(f"{namespace}.{tag}", field.group(3).strip())
+                    if namespace.lower() == "column" and tag.isdigit():
+                        numbered[int(tag)] = _column(field.group(3))
             continue
+        if section != "data":
+            if not _is_number(stripped.split()[0]):
+                problems.append(
+                    f"line {number}: unsupported comment character '{stripped[0]}'"
+                )
+                continue
+            if section != "labels":
+                problems.append(f"line {number}: data without header-end line")
+            section = "data"
+        values = _data_values(stripped, f"'{name}', line {number}")
         if rows and len(values) != len(rows[0]):
-            skipped.append(number)
-            continue
+            raise ValueError(
+                f"'{name}', line {number}: {len(values)} values "
+                f"for {len(rows[0])} columns"
+            )
         rows.append(values)
     if not rows:
         raise ValueError(f"'{path}' has no data")
+    if outer and outer[0][1] > 0:
+        # Points before the first outer value of the data section: header value
+        first = fields.get("outer.value")
+        initial = _outer_value(first, f"'{name}'") if first else math.nan
+        outer.insert(0, (initial, 0))
     count = len(rows[0])
     if numbered:
         columns = [
@@ -170,15 +290,17 @@ def read_xdi(path: str | Path) -> XdiFile:
             for index in range(1, count + 1)
         ]
     else:
-        names = last_header.split()
+        names = label_line.split()
         names += [f"column{index + 1}" for index in range(len(names), count)]
         columns = [XdiColumn(names[index]) for index in range(count)]
     return XdiFile(
         path=str(path),
         version=match.group(1),
-        fields=fields,
+        fields=fields.values,
         comments=tuple(comments),
         columns=tuple(columns),
         data=np.array(rows, dtype=float),
-        skipped_lines=tuple(skipped),
+        applications=match.group(2).strip(),
+        problems=tuple(problems),
+        outer=tuple(outer),
     )
diff --git a/src/datalab_synchrotron/formats.py b/src/datalab_synchrotron/formats.py
index 42ae9de..a2df9a6 100644
--- a/src/datalab_synchrotron/formats.py
+++ b/src/datalab_synchrotron/formats.py
@@ -2,8 +2,9 @@
 
 **File > Open** reads a ``.spec`` file as one signal per scan: the last column
 (usually the detector counts) versus the first one (usually the scanned motor).
-Other columns and MCA spectra are imported with the plugin's import action.
-It reads an ``.xdi`` file as one signal per column versus the energy.
+Scans that cannot be read are left out. Other columns, MCA spectra and mesh
+scans are imported with the plugin's import action. It reads an ``.xdi`` file as
+one signal per column versus the energy.
 """
 
 from __future__ import annotations
@@ -14,7 +15,12 @@
 
 from .core import SpecFile, read_xdi, scan_signals, xdi_signals
 
-__all__ = ["SpecSignalFormat", "XdiSignalFormat", "unregister_formats"]
+__all__ = [
+    "SpecSignalFormat",
+    "XdiSignalFormat",
+    "register_formats",
+    "unregister_formats",
+]
 
 
 class SpecSignalFormat(SignalFormatBase):
@@ -28,16 +34,28 @@ class SpecSignalFormat(SignalFormatBase):
     )
 
     def read(self, filename: str, worker=None) -> list[SignalObj]:
-        """Read the last column versus the first one, for each scan."""
+        """Read the last column versus the first one, for each scan.
+
+        Raises:
+            ValueError: if no scan could be read
+        """
         spec = SpecFile(filename)
         signals: list[SignalObj] = []
+        errors: list[str] = []
         for info in spec.scans:
             if len(info.labels) < 2 or info.point_count == 0:
                 continue
-            scan = spec.read_scan(info.key)
-            signals.extend(scan_signals(spec, scan, info.labels[0], info.labels[-1:]))
+            try:
+                scan = spec.read_scan(info.key)
+                signals.extend(
+                    scan_signals(spec, scan, info.labels[0], info.labels[-1:])
+                )
+            except Exception as exc:  # pylint: disable=broad-except
+                # Data of third-party files: read the other scans
+                errors.append(f"scan {info.key}: {exc}")
         if not signals:
-            raise ValueError(f"'{filename}' holds no scan with data columns")
+            reason = f" ({errors[0]})" if errors else ""
+            raise ValueError(f"'{filename}' holds no readable scan{reason}")
         return signals
 
 
@@ -56,8 +74,26 @@ def read(self, filename: str, worker=None) -> list[SignalObj]:
         return xdi_signals(read_xdi(filename))
 
 
+#: Format classes of this module
+FORMAT_CLASSES = (SpecSignalFormat, XdiSignalFormat)
+
+
+def register_formats() -> None:
+    """Register this module's formats in Sigima, if they were unregistered."""
+    for format_class in FORMAT_CLASSES:
+        SignalIORegistry.register_format(format_class)
+
+
 def unregister_formats() -> None:
-    """Remove this module's formats from Sigima (when the plugin is unloaded)."""
-    # Sigima registers one instance per format class, without removal API
-    instances = SignalIORegistry._io_format_instances  # pylint: disable=W0212
-    instances[:] = [fmt for fmt in instances if type(fmt).__module__ != __name__]
+    """Remove this module's formats from Sigima (when the plugin is unloaded).
+
+    Formats defined by earlier imports of this module (plugin reloads) are removed
+    too.
+    """
+    classes = {
+        fmt.__class__
+        for fmt in SignalIORegistry.get_formats()
+        if fmt.__class__.__module__ == __name__
+    }
+    for format_class in classes:
+        SignalIORegistry.unregister_format(format_class)
diff --git a/tests/integration/test_desktop_adapter.py b/tests/integration/test_desktop_adapter.py
index 050583e..4e84a74 100644
--- a/tests/integration/test_desktop_adapter.py
+++ b/tests/integration/test_desktop_adapter.py
@@ -13,13 +13,15 @@
 from datalab.env import execenv
 from datalab.plugins import PluginCapability
 from datalab.tests import datalab_test_app_context
+from sigima.io.signal.base import SignalIORegistry
 from sigima.objects import get_experimental_source
 from sigimax.h5.mapping import registered_mappings
-from support.spec_files import write_spec
+from support.spec_files import MORE_TEXT, write_spec
 
-from datalab_synchrotron import PLUGIN_ID
+from datalab_synchrotron import PLUGIN_ID, formats
 from datalab_synchrotron.adapters import desktop
-from datalab_synchrotron.mappings import packaged_mappings
+from datalab_synchrotron.core import SpecFile
+from datalab_synchrotron.mappings import packaged_mappings, unregister_mappings
 
 
 def test_plugin_descriptor() -> None:
@@ -60,20 +62,44 @@ def _patch_parameters(
     scans: str,
     x: str,
     counters: list[str],
-    mca: bool = False,
+    mca: list[str] | None = None,
+    mesh: bool = True,
 ) -> None:
     """Answer the SPEC import dialog with the given parameters."""
     original = desktop._import_parameters  # pylint: disable=protected-access
 
     def parameters(spec):
         param = original(spec)
-        param.scans, param.x, param.counters, param.mca = scans, x, counters, mca
+        param.scans, param.x, param.counters = scans, x, counters
+        param.mca, param.mesh = mca or [], mesh
         monkeypatch.setattr(param, "edit", lambda **_kwargs: True)
         return param
 
     monkeypatch.setattr(desktop, "_import_parameters", parameters)
 
 
+def test_import_parameters(tmp_path: Path) -> None:
+    """The dialog proposes the MCA devices of the file, and hides the MCA and mesh
+    items when the file has neither MCA spectra nor mesh scans."""
+    param = desktop._import_parameters(  # pylint: disable=protected-access
+        SpecFile(write_spec(tmp_path / "more.spec", text=MORE_TEXT))
+    )
+    items = {item.get_name(): item for item in param.get_items()}
+    mca, mesh = items["mca"], items["mesh"]
+    assert [value for value, *_label in mca.get_prop("data", "choices")] == [
+        "mca1",
+        "mca2",
+    ]
+    assert not mca.get_prop_value("display", param, "hide")
+    assert not mesh.get_prop_value("display", param, "hide")
+    plain = desktop._import_parameters(  # pylint: disable=protected-access
+        SpecFile(write_spec(tmp_path / "plain.spec", text=MORE_TEXT.split("#S 2")[0]))
+    )
+    for item in plain.get_items():
+        if item.get_name() in ("mca", "mesh"):
+            assert item.get_prop_value("display", plain, "hide")
+
+
 def test_import_spec_scans(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
     """Selected scans are imported in one group each, with their origin."""
     filename = write_spec(tmp_path / "beamtime.dat")
@@ -111,11 +137,41 @@ def test_skipped_scans_report(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -
         monkeypatch.setattr(plugin, "show_warning", warnings.append)
         assert plugin.import_spec_scans(filename) == 2
     assert warnings == [
-        "Selected columns were not imported from 3 of 5 scans:\n"
+        "Selected data was not imported from 3 of 5 scans:\n"
         "No column Theta, Detector counts (3 scans: 2.1, 3.1, 4.1)"
     ]
 
 
+def test_import_mca_and_mesh_images(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """MCA spectra and mesh scans are imported as images, in a group of the image
+    panel named after the scan."""
+    filename = write_spec(tmp_path / "more.spec", text=MORE_TEXT)
+    _patch_parameters(monkeypatch, "2-3", "Energy", ["counts"], ["mca2"])
+    warnings: list[str] = []
+    with (
+        execenv.context(unattended=True),
+        datalab_test_app_context(console=False, exec_loop=False) as main,
+    ):
+        plugin = desktop.SynchrotronPlugin()
+        plugin.main, plugin.proxy = main, LocalProxy(main)
+        monkeypatch.setattr(plugin, "show_warning", warnings.append)
+        assert plugin.import_spec_scans(filename) == 2
+        image_groups = main.imagepanel.objmodel.get_groups()
+        assert [group.title for group in image_groups[-2:]] == [
+            "Scan 2.1 - ascan en 690 692 2 1",
+            "Scan 3.1 - mesh  samx 0 2 2  samy 11 10 1  1",
+        ]
+        (mca,) = image_groups[-2].get_objects()
+        assert mca.title == "mca2 (scan 2.1)" and mca.data.shape == (3, 4)
+        (mesh,) = image_groups[-1].get_objects()
+        assert mesh.title == "counts (scan 3.1)"
+    assert warnings == [
+        "Selected data was not imported from 1 of 2 scans:\nNo column counts (scan 2.1)"
+    ]
+
+
 class _CancellingProgress:
     """Progress dialog whose Cancel button is pressed at the n-th check."""
 
@@ -135,9 +191,9 @@ def wasCanceled(self) -> bool:  # pylint: disable=invalid-name
 
 
 def test_cancel_spec_import(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
-    """Signals are added in batches, and the import stops when cancelled."""
+    """Objects are added in batches, and the import stops when cancelled."""
     filename = write_spec(tmp_path / "beamtime.dat")
-    _patch_parameters(monkeypatch, "4", "Energy", [], mca=True)
+    _patch_parameters(monkeypatch, "4", "Energy", ["I0", "It"])
     monkeypatch.setattr(desktop, "ADD_BATCH_SIZE", 1)
     progress = _CancellingProgress(checks=3)
     monkeypatch.setattr(
@@ -154,7 +210,7 @@ def test_cancel_spec_import(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) ->
         # Checks: before reading scan 4.1, before its 1st and 2nd batch of 1 signal
         assert plugin.import_spec_scans(filename) == 1
         assert len(main.signalpanel.objmodel.get_groups()[-1].get_objects()) == 1
-    assert infos == ["Import cancelled: 1 signal(s) imported."]
+    assert infos == ["Import cancelled: 1 object(s) imported."]
 
 
 def test_not_a_spec_file(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
@@ -187,11 +243,9 @@ def _write_scan_file(filename: Path) -> str:
     return str(filename)
 
 
-def test_scan_counters_mapping(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+def test_scan_counters_mapping(tmp_path: Path) -> None:
     """While the plugin is loaded, every scan counter is imported versus time."""
     filename = _write_scan_file(tmp_path / "scan.nxs")
-    # Sigima formats cannot be registered again: they stay for the other tests
-    monkeypatch.setattr(desktop, "unregister_formats", lambda: None)
     plugin = desktop.SynchrotronPlugin()
     plugin.register_hooks()
     try:
@@ -222,3 +276,18 @@ def test_scan_counters_mapping(tmp_path: Path, monkeypatch: pytest.MonkeyPatch)
         plugin.unregister_hooks()
     names = {mapping.name for mapping in registered_mappings()}
     assert not names & {mapping.name for mapping in packaged_mappings()}
+    assert not [fmt for fmt in SignalIORegistry.get_formats() if _is_plugin(fmt)]
+    # Loading the plugin again registers its formats again (kept for other tests)
+    plugin.register_hooks()
+    try:
+        plugin_formats = [
+            fmt for fmt in SignalIORegistry.get_formats() if _is_plugin(fmt)
+        ]
+        assert len(plugin_formats) == 2
+    finally:
+        unregister_mappings()
+
+
+def _is_plugin(fmt) -> bool:
+    """Return True if a format handler is defined by the plugin."""
+    return fmt.__class__.__module__ == formats.__name__
diff --git a/tests/support/spec_files.py b/tests/support/spec_files.py
index e66436e..505136c 100644
--- a/tests/support/spec_files.py
+++ b/tests/support/spec_files.py
@@ -70,12 +70,67 @@
 @A 3 4 5 6
 """
 
+#: Conventions of other acquisition programs and SPEC versions: Bluesky header
+#: (empty motor lines, ``None`` values, ``#MD`` metadata), labels separated by
+#: single spaces, several MCA devices with their own calibration, other ``@``
+#: lines, and an interrupted mesh scan
+MORE_TEXT = """\
+#F bluesky.spec
+#E 1792483200
+#D Tue Oct 20 12:00:00 2026
+#C Bluesky  user = test
+#O0\x20
+#o0\x20
+
+#S 1 count(detectors=['scaler'])
+#D Tue Oct 20 12:01:00 2026
+#T 0.5  (seconds)
+#M 1000  (I0)
+#Q 1 0 0.5
+#G0 0 0 1 2
+#MD uid = 1234-abcd
+#N 4
+#L Epoch seconds I0 diode
+1.5 0.5 1000 None
+2.5 0.5 1001 12
+#C Scan ended normally.
+
+#S 2 ascan en 690 692 2 1
+#D Tue Oct 20 12:02:00 2026
+#N 3
+#L Energy  I0  TEY
+#@CALIB 0 1 0
+#@CALIB 1 2 0 mca2
+#@CHANN 4 0 3 1 mca2
+690 100 5
+@A1 1 2 3 4
+@A2 5 6 7 8
+691 101 6
+@A1 2 3 4 5
+@A2 6 7 8 9
+692 102 7
+@A1 3 4 5 6
+@A2 7 8 9 10
+@0 0 0 0 0 0 0 0 0\\
+ 1 1 1 1
+
+#S 3 mesh  samx 0 2 2  samy 11 10 1  1
+#D Tue Oct 20 12:03:00 2026
+#N 3
+#L Sample X  Sample Y  counts
+0 11 1
+1 11 2
+2 11 3
+0 10 4
+1 10 5
+"""
+
 
-def write_spec(path: Path, newline: str = "\n") -> str:
-    """Write the synthetic SPEC file and return its name.
+def write_spec(path: Path, newline: str = "\n", text: str = SPEC_TEXT) -> str:
+    """Write a synthetic SPEC file and return its name.
 
     SPEC writes ``\\n`` line endings; ``newline`` lets tests check others.
     """
     with open(path, "w", encoding="latin-1", newline=newline) as file:
-        file.write(SPEC_TEXT)
+        file.write(text)
     return str(path)
diff --git a/tests/unit/test_formats.py b/tests/unit/test_formats.py
index e300062..dfc1327 100644
--- a/tests/unit/test_formats.py
+++ b/tests/unit/test_formats.py
@@ -5,6 +5,7 @@
 from pathlib import Path
 
 import numpy as np
+import pytest
 import sigima.io
 from sigima.io.signal.base import SignalIORegistry
 from sigima.objects import get_experimental_source
@@ -12,6 +13,7 @@
 from support.xas_corpus import spectrum
 
 from datalab_synchrotron import formats
+from datalab_synchrotron.core import SpecFile
 
 
 def _spec_formats() -> list:
@@ -33,6 +35,27 @@ def test_open_spec_file(tmp_path: Path) -> None:
     ]
 
 
+def test_open_spec_file_with_unreadable_scan(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Scans that cannot be read are left out; a file without readable scan is
+    refused with the first error."""
+    filename = write_spec(tmp_path / "scans.spec")
+    read_scan = SpecFile.read_scan
+
+    def failing(self, key: str):
+        if key != "2.1":
+            raise IndexError("list index out of range")
+        return read_scan(self, key)
+
+    monkeypatch.setattr(SpecFile, "read_scan", failing)
+    signals = sigima.io.read_signals(filename)
+    assert [signal.title for signal in signals] == ["It (scan 2.1)"]
+    monkeypatch.setattr(SpecFile, "read_scan", lambda *_args: [][0])
+    with pytest.raises(ValueError, match=r"holds no readable scan \(scan 1.1: "):
+        sigima.io.read_signals(filename)
+
+
 def test_open_xdi_file() -> None:
     """File > Open reads every column versus the energy, with units and origin."""
     item = spectrum("cu_foil")
@@ -49,11 +72,14 @@ def test_open_xdi_file() -> None:
 
 
 def test_unregister_formats() -> None:
-    """Unloading the plugin removes its formats from Sigima."""
+    """Unloading the plugin removes its formats from Sigima, and loading it again
+    registers them again."""
     assert len(_spec_formats()) == 2
     formats.unregister_formats()
     try:
         assert not _spec_formats()
     finally:
-        registered = SignalIORegistry.get_formats()
-        registered.extend((formats.SpecSignalFormat(), formats.XdiSignalFormat()))
+        formats.register_formats()
+    assert len(_spec_formats()) == 2
+    formats.register_formats()
+    assert len(_spec_formats()) == 2
diff --git a/tests/unit/test_scan_import.py b/tests/unit/test_scan_import.py
index 2dde49f..b52ab22 100644
--- a/tests/unit/test_scan_import.py
+++ b/tests/unit/test_scan_import.py
@@ -5,11 +5,12 @@
 from pathlib import Path
 
 import pytest
-from support.spec_files import write_spec
+from support.spec_files import MORE_TEXT, write_spec
 
 from datalab_synchrotron.core import (
     SkippedScan,
     SpecFile,
+    import_scan,
     plan_scan_import,
     select_scans,
     summarize_skipped,
@@ -61,20 +62,53 @@ def test_one_group_per_scan(spec: SpecFile) -> None:
         SkippedScan(key, "no column Theta, Monitor, Detector counts")
         for key in ("2.1", "3.1", "4.1")
     )
-    assert plan.signal_count == 4
+    assert plan.object_count == 4
 
 
 def test_mca_only(spec: SpecFile) -> None:
-    """MCA spectra are imported without columns, from the scans that have some."""
-    plan = plan_scan_import(spec, ["3.1", "4.1"], "Energy", [], include_mca=True)
-    assert [len(group.signals) for group in plan.groups] == [1, 3]
-    with pytest.raises(ValueError, match="Select at least one counter"):
+    """MCA spectra are imported without columns, as one image per device, from the
+    scans that have some."""
+    plan = plan_scan_import(spec, ["3.1", "4.1"], "Energy", [], ["mca"])
+    assert [len(group.images) for group in plan.groups] == [1, 1]
+    assert not any(group.signals for group in plan.groups)
+    assert plan.groups[1].images[0].data.shape == (3, 4)
+    with pytest.raises(ValueError, match="Select at least one counter or MCA"):
         plan_scan_import(spec, ["3.1"], "Energy", ["Energy"])
-    message = "No signal to import:\nNo column Energy, I0 \\(scan 1.1\\)"
+    message = "Nothing to import:\nNo column Energy, I0 \\(scan 1.1\\)"
     with pytest.raises(ValueError, match=message):
         plan_scan_import(spec, ["1.1"], "Energy", ["I0"])
 
 
+def test_mesh_scans(tmp_path: Path) -> None:
+    """Counters of mesh scans are images, unless asked otherwise; the X column is
+    then not needed."""
+    more = SpecFile(write_spec(tmp_path / "more.spec", text=MORE_TEXT))
+    group, skipped = import_scan(more, "3.1", "Energy", ["counts"])
+    assert skipped is None and not group.signals
+    assert group.images[0].data.shape == (2, 3)
+    group, _skipped = import_scan(
+        more, "3.1", "Sample X", ["counts"], mesh_as_images=False
+    )
+    assert len(group.signals) == 1 and not group.images
+
+
+def test_unreadable_scan(spec: SpecFile, monkeypatch: pytest.MonkeyPatch) -> None:
+    """A scan that cannot be read is skipped with the error, the others are read."""
+    read_scan = spec.read_scan
+
+    def failing(key: str):
+        if key == "1.2":
+            raise IndexError("list index out of range")
+        return read_scan(key)
+
+    monkeypatch.setattr(spec, "read_scan", failing)
+    plan = plan_scan_import(spec, ["1.1", "1.2"], "Theta", ["Monitor"])
+    assert [group.title for group in plan.groups] == [
+        "Scan 1.1 - ascan  th 1 0.6 4 0.1"
+    ]
+    assert plan.skipped == (SkippedScan("1.2", "unreadable: list index out of range"),)
+
+
 def test_summarize_skipped() -> None:
     """Skipped scans are reported in one line per reason, most frequent first,
     with a short list of scans: the report stays short for large files."""
diff --git a/tests/unit/test_spec.py b/tests/unit/test_spec.py
index a382c3c..072f08b 100644
--- a/tests/unit/test_spec.py
+++ b/tests/unit/test_spec.py
@@ -1,15 +1,24 @@
-"""SPEC files: index, data, MCA spectra and conversion to signals."""
+"""SPEC files: index, data, MCA spectra and conversion to signals and images."""
 
 from __future__ import annotations
 
+import math
 from pathlib import Path
 
 import numpy as np
 import pytest
 from sigima.objects import get_experimental_source
-from support.spec_files import write_spec
+from support.spec_files import MORE_TEXT, write_spec
 
-from datalab_synchrotron.core import SpecFile, is_spec_file, mca_signals, scan_signals
+from datalab_synchrotron.core import (
+    SpecFile,
+    is_spec_file,
+    mca_images,
+    mesh_images,
+    mesh_shape,
+    scan_metadata,
+    scan_signals,
+)
 
 
 @pytest.fixture(name="spec")
@@ -18,6 +27,12 @@ def fixture_spec(tmp_path: Path) -> SpecFile:
     return SpecFile(write_spec(tmp_path / "scans.dat"))
 
 
+@pytest.fixture(name="more")
+def fixture_more(tmp_path: Path) -> SpecFile:
+    """Synthetic SPEC file with the conventions of other acquisition programs."""
+    return SpecFile(write_spec(tmp_path / "more.spec", text=MORE_TEXT))
+
+
 def test_index(spec: SpecFile) -> None:
     """Repeated scan numbers are told apart by their occurrence."""
     keys = [info.key for info in spec.scans]
@@ -28,6 +43,8 @@ def test_index(spec: SpecFile) -> None:
     assert (first.point_count, second.point_count) == (5, 3)
     assert spec.get_info("3.1").mca_count == 1
     assert spec.get_info("4.1").mca_count == 3
+    assert spec.get_info("4.1").mca_devices == ("mca",)
+    assert spec.get_info("1.1").mca_devices == ()
     with pytest.raises(ValueError, match="has no scan 9.1"):
         spec.read_scan("9.1")
 
@@ -57,20 +74,43 @@ def test_file_headers_apply_to_following_scans(spec: SpecFile) -> None:
 
 
 def test_mca_spectra(spec: SpecFile) -> None:
-    """MCA lines are joined across continuations and calibrated if declared."""
+    """MCA lines are joined across continuations, with channel range and
+    calibration."""
     scan = spec.read_scan("3.1")
-    (spectrum,) = scan.mca
+    (spectrum,) = scan.mca["mca"]
     assert np.array_equal(spectrum, np.arange(8))
-    assert scan.mca_channels == (8, 2, 9, 1)
-    assert scan.mca_calibration == (0.5, 0.25, 0.0)
-    (signal,) = mca_signals(spec, scan)
-    assert np.allclose(signal.x, 0.5 + 0.25 * np.arange(2, 10))
-    source = get_experimental_source(signal)
-    assert source["selection"] == {"mca": 0}
-    assert source["conversions"][0].startswith("channels -> a + b*ch + c*ch^2")
-    raw = mca_signals(spec, spec.read_scan("4.1"), [2])
-    assert np.array_equal(raw[0].x, [0.0, 1.0, 2.0, 3.0])
-    assert np.array_equal(raw[0].y, [3.0, 4.0, 5.0, 6.0])
+    assert scan.mca_channels == {"": (8, 2, 9, 1)}
+    assert scan.calibration("mca") == (0.5, 0.25, 0.0)
+    assert np.array_equal(scan.channel_numbers("mca"), np.arange(2, 10))
+    with pytest.raises(ValueError, match="'mca9' has no spectrum"):
+        scan.channel_numbers("mca9")
+
+
+def test_mca_images(spec: SpecFile) -> None:
+    """The spectra of a device are an image: one spectrum per row, calibrated
+    channels along X, the X column of the scan along Y if it is monotonic."""
+    scan = spec.read_scan("4.1")
+    (image,) = mca_images(spec, scan, "Energy")
+    assert image.title == "mca (scan 4.1)"
+    np.testing.assert_array_equal(
+        image.data, [[1, 2, 3, 4], [2, 3, 4, 5], [3, 4, 5, 6]]
+    )
+    np.testing.assert_array_equal(image.ycoords, [7.1, 7.2, 7.4])
+    np.testing.assert_array_equal(image.xcoords, [0, 1, 2, 3])
+    assert (image.xlabel, image.ylabel, image.zlabel) == ("Channel", "Energy", "Counts")
+    assert get_experimental_source(image)["selection"] == {"mca": "mca", "y": "Energy"}
+    (by_point,) = mca_images(spec, scan)
+    assert by_point.ylabel == "Point"
+    assert (by_point.x0, by_point.dx, by_point.y0, by_point.dy) == (0, 1, 0, 1)
+    assert get_experimental_source(by_point)["selection"]["y"] == "point"
+    (decreasing,) = mca_images(spec, scan, "It")
+    np.testing.assert_array_equal(decreasing.ycoords, [47, 49, 50])
+    np.testing.assert_array_equal(decreasing.data[0], [3, 4, 5, 6])
+    (calibrated,) = mca_images(spec, spec.read_scan("3.1"))
+    assert calibrated.xlabel == "Calibrated channel"
+    assert (calibrated.x0, calibrated.dx) == (1.0, 0.25)
+    conversions = get_experimental_source(calibrated)["conversions"]
+    assert conversions[1].startswith("channels -> a + b*ch + c*ch^2")
 
 
 def test_scan_signals_record_their_origin(spec: SpecFile) -> None:
@@ -92,6 +132,83 @@ def test_scan_signals_record_their_origin(spec: SpecFile) -> None:
             "skipped_lines": 1,
         },
     }
+    assert signal.metadata["SPEC comments"].endswith("Scan aborted after 2 points.")
+
+
+def test_other_conventions(more: SpecFile) -> None:
+    """Labels separated by single spaces are split according to the column count,
+    missing values are NaN, and empty motor lines are accepted."""
+    info = more.get_info("1.1")
+    assert info.labels == ("Epoch", "seconds", "I0", "diode")
+    scan = more.read_scan("1.1")
+    assert math.isnan(scan.column("diode")[0])
+    assert scan.column("diode")[1] == 12
+    assert not scan.problems and scan.motors == {}
+
+
+def test_scan_header_metadata(more: SpecFile) -> None:
+    """Count time, monitor, hkl, geometry, comments and Bluesky metadata are kept."""
+    metadata = scan_metadata(more.read_scan("1.1"))
+    hkl, geometry = metadata.pop("SPEC hkl"), metadata.pop("SPEC geometry G0")
+    np.testing.assert_array_equal(hkl, [1, 0, 0.5])
+    np.testing.assert_array_equal(geometry, [0, 0, 1, 2])
+    assert metadata == {
+        "SPEC count time": 0.5,
+        "SPEC count time unit": "seconds",
+        "SPEC monitor count": 1000.0,
+        "SPEC monitor counter": "I0",
+        "SPEC MD uid": "1234-abcd",
+        "SPEC comments": "Scan ended normally.",
+    }
+    (signal,) = scan_signals(more, more.read_scan("1.1"), "Epoch", ["I0"])
+    assert signal.metadata["SPEC MD uid"] == "1234-abcd"
+
+
+def test_mca_devices(more: SpecFile) -> None:
+    """Spectra of several devices are told apart, with their own calibration and
+    channels; other '@' lines are ignored and counted."""
+    info = more.get_info("2.1")
+    assert (info.point_count, info.mca_count) == (3, 6)
+    assert info.mca_devices == ("mca1", "mca2")
+    scan = more.read_scan("2.1")
+    assert [spectrum.tolist() for spectrum in scan.mca["mca1"]] == [
+        [1, 2, 3, 4],
+        [2, 3, 4, 5],
+        [3, 4, 5, 6],
+    ]
+    assert scan.ignored == {"@0": 1}
+    assert not scan.problems
+    mca1, mca2 = mca_images(more, scan, "Energy")
+    assert (mca1.x0, mca1.dx) == (0, 1)
+    assert (mca2.x0, mca2.dx) == (1, 2)
+    assert (mca2.y0, mca2.dy) == (690, 1)
+    np.testing.assert_array_equal(mca2.data[2], [7, 8, 9, 10])
+    assert get_experimental_source(mca1)["details"]["ignored_lines"] == {"@0": 1}
+    (only,) = mca_images(more, scan, "Energy", ["mca2"])
+    assert only.title == "mca2 (scan 2.1)"
+
+
+def test_mesh_images(more: SpecFile) -> None:
+    """Counters of a mesh scan are images of the two motors; missing points of an
+    interrupted mesh are NaN, and decreasing motors are reversed."""
+    info = more.get_info("3.1")
+    shape = mesh_shape(info)
+    assert (shape.columns, shape.rows, shape.steps) == (3, 2, (1.0, -1.0))
+    assert mesh_shape(more.get_info("2.1")) is None
+    (image,) = mesh_images(more, more.read_scan("3.1"), ["counts"])
+    assert (image.xlabel, image.ylabel, image.zlabel) == (
+        "Sample X",
+        "Sample Y",
+        "counts",
+    )
+    assert (image.x0, image.dx, image.y0, image.dy) == (0, 1, 10, 1)
+    np.testing.assert_array_equal(image.data, [[4, 5, np.nan], [1, 2, 3]])
+    source = get_experimental_source(image)
+    assert source["selection"] == {"x": "Sample X", "y": "Sample Y", "z": "counts"}
+    assert "incomplete mesh: 1 points set to NaN" in source["conversions"]
+    assert "axis 'Sample Y': reversed to increasing order" in source["conversions"]
+    with pytest.raises(ValueError, match="not a mesh scan"):
+        mesh_images(more, more.read_scan("2.1"), ["TEY"])
 
 
 def test_is_spec_file(tmp_path: Path) -> None:
diff --git a/tests/unit/test_xdi.py b/tests/unit/test_xdi.py
index 1542076..24065c9 100644
--- a/tests/unit/test_xdi.py
+++ b/tests/unit/test_xdi.py
@@ -6,9 +6,16 @@
 
 import numpy as np
 import pytest
+from sigima.objects import get_experimental_source
 from support.xas_corpus import DATA_DIR, read_columns, spectrum
 
-from datalab_synchrotron.core import is_xdi_file, read_xdi
+from datalab_synchrotron.core import (
+    HC_EV_ANGSTROM,
+    is_xdi_file,
+    read_xdi,
+    xdi_energy,
+    xdi_signals,
+)
 
 XDI_FILES = sorted(path.name for path in DATA_DIR.glob("*.xdi"))
 
@@ -24,7 +31,7 @@ def test_read_measured_files(name: str) -> None:
     assert [column.name.lower() for column in xdi.columns] == list(expected)
     np.testing.assert_array_equal(xdi.data, np.column_stack(list(expected.values())))
     assert xdi.columns[0].units == "eV"
-    assert not xdi.skipped_lines
+    assert not xdi.problems
 
 
 def test_fields_and_comments() -> None:
@@ -59,16 +66,120 @@ def test_other_files_are_not_xdi(tmp_path: Path) -> None:
 
 
 def test_labels_without_column_fields(tmp_path: Path) -> None:
-    """Without Column fields, labels come from the last header line; malformed
-    data lines are skipped and recorded."""
+    """Without Column fields, labels come from the line following the header end."""
     path = tmp_path / "minimal.xdi"
     path.write_text(
-        "# XDI/1.0\n# Element.symbol: Fe\n#----\n# energy mu\n"
-        "7100 0.1\n7101 bad\n7102\n7103 0.4\n",
+        "# XDI/1.0\n# Element.symbol: Fe\n#----\n# energy mu\n7100 0.1\n7103 0.4\n",
         encoding="utf-8",
     )
     xdi = read_xdi(path)
     assert [column.name for column in xdi.columns] == ["energy", "mu"]
-    assert xdi.skipped_lines == (6, 7)
     np.testing.assert_array_equal(xdi.column("mu"), [0.1, 0.4])
     assert xdi.element == "Fe" and xdi.edge == ""
+
+
+_HEADER = "# XDI/1.0 GSE/1.0\n# Column.1: energy eV\n# Column.2: mu\n"
+
+
+@pytest.mark.parametrize(
+    "line, message",
+    [
+        ("7102 0.2 0.3", "line 6: 3 values for 2 columns"),
+        ("7102", "line 6: 1 values for 2 columns"),
+        ("7102 nan", "line 6: 'nan' is not a finite number"),
+        ("7102 bad", "line 6: 'bad' is not a number"),
+        ("7102 1.2.3", "line 6: '1.2.3' is not a number"),
+    ],
+)
+def test_invalid_data_lines(tmp_path: Path, line: str, message: str) -> None:
+    """Invalid data lines are refused with their line number, as the reference
+    XDI library does, instead of being left out silently."""
+    path = tmp_path / "invalid.xdi"
+    path.write_text(f"{_HEADER}#----\n7100 0.1\n{line}\n", encoding="utf-8")
+    with pytest.raises(ValueError, match=f"'invalid.xdi', {message}"):
+        read_xdi(path)
+
+
+def test_header_problems(tmp_path: Path) -> None:
+    """Invalid header lines are recorded and ignored; the last occurrence of a
+    field wins, whatever its case."""
+    path = tmp_path / "header.xdi"
+    path.write_text(
+        _HEADER
+        + "# Sample.name: first\n# Family.key:\n# Family.key  Value\n"
+        + "# 2000Family.key: Value\n# Family.00key: Value\n# sample.NAME: last\n"
+        + "! Beamline.name: 13ID\n#----\n7100 0.1\n",
+        encoding="utf-8",
+    )
+    xdi = read_xdi(path)
+    assert xdi.problems == (
+        "line 5: field without value",
+        "line 6: not a 'Namespace.tag: value' field",
+        "line 7: not a 'Namespace.tag: value' field",
+        "line 10: unsupported comment character '!'",
+    )
+    assert xdi.field("Sample.name") == "last"
+    assert "Sample.name" not in xdi.fields
+    assert xdi.field("Family.00key") == "Value"
+    assert xdi.applications == "GSE/1.0"
+
+
+def test_utf8_text_and_comments(tmp_path: Path) -> None:
+    """Free text is read as UTF-8; comments keep their inner spaces."""
+    path = tmp_path / "utf8.xdi"
+    path.write_text(
+        _HEADER
+        + "# Sample.name: Échantillon µ-Cu, 25 °C\n# ///\n#  two  spaces kept\n#\n"
+        + "#----\n# energy mu\n7100 0.1\n",
+        encoding="utf-8",
+    )
+    xdi = read_xdi(path)
+    assert xdi.field("Sample.name") == "Échantillon µ-Cu, 25 °C"
+    assert xdi.comments == (" two  spaces kept", "")
+    latin1 = tmp_path / "latin1.xdi"
+    latin1.write_bytes(path.read_bytes().decode("utf-8").encode("latin-1"))
+    assert read_xdi(latin1).field("Sample.name") == "Échantillon µ-Cu, 25 °C"
+
+
+def test_header_without_end_line(tmp_path: Path) -> None:
+    """Data without header-end line is read, and the problem is recorded."""
+    path = tmp_path / "noend.xdi"
+    path.write_text(_HEADER + "# ///\n# comment\n7100 0.1\n", encoding="utf-8")
+    xdi = read_xdi(path)
+    assert xdi.data.shape == (1, 2)
+    assert xdi.problems == ("line 6: data without header-end line",)
+
+
+def test_angle_to_energy(tmp_path: Path) -> None:
+    """Monochromator angles are converted to energies with the Bragg law when the
+    lattice spacing is given, and kept otherwise."""
+    path = tmp_path / "angle.xdi"
+    header = "# XDI/1.0\n# Column.1: angle degrees\n# Column.2: mu\n"
+    path.write_text(
+        header + "# Mono.d_spacing: 3.13553\n#----\n14.6 0.1\n14.4 0.2\n",
+        encoding="utf-8",
+    )
+    xdi = read_xdi(path)
+    energy, column, conversions = xdi_energy(xdi)
+    expected = HC_EV_ANGSTROM / (2 * 3.13553 * np.sin(np.deg2rad([14.6, 14.4])))
+    np.testing.assert_allclose(energy, expected)
+    assert (column.name, column.units) == ("energy", "eV")
+    assert conversions[0].startswith("angle -> energy: E = hc / (2 d sin(angle))")
+    (signal,) = xdi_signals(xdi)
+    assert (signal.xlabel, signal.xunit) == ("energy", "eV")
+    source = get_experimental_source(signal)
+    assert source["selection"] == {"x": "angle", "y": "mu"}
+    assert source["conversions"] == conversions
+    path.write_text(header + "#----\n14.6 0.1\n", encoding="utf-8")
+    energy, column, conversions = xdi_energy(read_xdi(path))
+    assert column.name == "angle" and not conversions
+
+
+def test_metadata() -> None:
+    """Every header field and the comments are kept as object metadata."""
+    (signal, *_others) = xdi_signals(read_xdi(DATA_DIR / "ni_metal_rt.xdi"))
+    assert signal.metadata["Sample.name"] == "Ni metal foil"
+    assert signal.metadata["Element.symbol"] == "Ni"
+    assert signal.metadata["XDI version"].startswith("XDI/1.0")
+    assert signal.metadata["XDI comments"].startswith("room temperature")
+    assert "XDI problems" not in signal.metadata

From b8b7620e4fccc8ee70290cae34b543409a3bed6b Mon Sep 17 00:00:00 2001
From: Pierre Raybaut <1311787+PierreRaybaut@users.noreply.github.com>
Date: Tue, 27 Oct 2026 11:23:49 +0100
Subject: [PATCH 2/4] test: validate SPEC and XDI readers on real files

SPEC: extracts of spec2nexus and PyMca files covering several MCA devices,
mesh scans, single-space labels, Bluesky and Sardana files, interrupted
scans and repeated scan numbers, compared with the values read by
spec2nexus (or silx). A script builds the extracts from pinned sources and
writes the references.

XDI: the test files of the XDI library, checked against its expected
behaviour.

Assisted-by: Claude Opus 5.5
---
 tests/data/spec/.gitattributes                |    1 +
 tests/data/spec/05_02_test_none.spec          |   87 +
 tests/data/spec/20220311-161530_scan2.spec    |   37 +
 tests/data/spec/33id_spec_mesh_escan.spec     | 1168 ++++++++++
 tests/data/spec/CdSe_scan92.spec              |   81 +
 tests/data/spec/EXAFS_Cu.dat                  | 1469 +++++++++++++
 tests/data/spec/LICENSE-pymca.txt             |   29 +
 tests/data/spec/LICENSE-spec2nexus.txt        |   95 +
 tests/data/spec/SOURCES.txt                   |   31 +
 tests/data/spec/issue216_scan1.spec           |   19 +
 .../data/spec/mca_spectra_example_scan1.spec  |   42 +
 tests/data/spec/references.json               | 1950 +++++++++++++++++
 tests/data/spec/spec_from_spock_scan1.spec    |  176 ++
 tests/data/spec/startup_1_scan16.spec         |  531 +++++
 tests/data/spec/twoc.dat                      |  142 ++
 tests/data/spec/user6idd.dat                  |  119 +
 tests/data/xdi/.gitattributes                 |    1 +
 tests/data/xdi/BadFiles.txt                   |   50 +
 tests/data/xdi/SHA256SUMS                     |   40 +
 tests/data/xdi/SOURCES.txt                    |   10 +
 tests/data/xdi/bad_00.xdi                     |   40 +
 tests/data/xdi/bad_01.xdi                     |   40 +
 tests/data/xdi/bad_02.xdi                     |   40 +
 tests/data/xdi/bad_03.xdi                     |   40 +
 tests/data/xdi/bad_04.xdi                     |   40 +
 tests/data/xdi/bad_05.xdi                     |   40 +
 tests/data/xdi/bad_06.xdi                     |   40 +
 tests/data/xdi/bad_07.xdi                     |   36 +
 tests/data/xdi/bad_08.xdi                     |   39 +
 tests/data/xdi/bad_09.xdi                     |   41 +
 tests/data/xdi/bad_10.xdi                     |   40 +
 tests/data/xdi/bad_11.xdi                     |   40 +
 tests/data/xdi/bad_12.xdi                     |   36 +
 tests/data/xdi/bad_13.xdi                     |   40 +
 tests/data/xdi/bad_14.xdi                     |   40 +
 tests/data/xdi/bad_15.xdi                     |   40 +
 tests/data/xdi/bad_16.xdi                     |   40 +
 tests/data/xdi/bad_17.xdi                     |   40 +
 tests/data/xdi/bad_18.xdi                     |   41 +
 tests/data/xdi/bad_19.xdi                     |   41 +
 tests/data/xdi/bad_20.xdi                     |   41 +
 tests/data/xdi/bad_21.xdi                     |   41 +
 tests/data/xdi/bad_22.xdi                     |   41 +
 tests/data/xdi/bad_23.xdi                     |   41 +
 tests/data/xdi/bad_24.xdi                     |   41 +
 tests/data/xdi/bad_25.xdi                     |   42 +
 tests/data/xdi/bad_26.xdi                     |   37 +
 tests/data/xdi/bad_27.xdi                     |   38 +
 tests/data/xdi/bad_28.xdi                     |   40 +
 tests/data/xdi/bad_29.xdi                     |   40 +
 tests/data/xdi/bad_30.xdi                     |   40 +
 tests/data/xdi/bad_31.xdi                     |   40 +
 tests/data/xdi/bad_32.xdi                     |   38 +
 tests/data/xdi/bad_33.xdi                     |   41 +
 tests/data/xdi/bad_34.xdi                     |   40 +
 tests/data/xdi/bad_35.xdi                     |   41 +
 tests/data/xdi/nonxafs_1d.xdi                 |  434 ++++
 tests/data/xdi/nonxafs_2d.xdi                 |  271 +++
 tests/data/xdi/nonxafs_negvalues.xdi          |   23 +
 tests/support/spec_corpus.py                  |  157 ++
 tests/validation/make_spec_corpus.py          |  210 ++
 tests/validation/test_silx_reference.py       |    8 +-
 tests/validation/test_spec_corpus.py          |  189 ++
 tests/validation/test_xdi_corpus.py           |  128 ++
 64 files changed, 8932 insertions(+), 2 deletions(-)
 create mode 100644 tests/data/spec/.gitattributes
 create mode 100644 tests/data/spec/05_02_test_none.spec
 create mode 100644 tests/data/spec/20220311-161530_scan2.spec
 create mode 100644 tests/data/spec/33id_spec_mesh_escan.spec
 create mode 100644 tests/data/spec/CdSe_scan92.spec
 create mode 100644 tests/data/spec/EXAFS_Cu.dat
 create mode 100644 tests/data/spec/LICENSE-pymca.txt
 create mode 100644 tests/data/spec/LICENSE-spec2nexus.txt
 create mode 100644 tests/data/spec/SOURCES.txt
 create mode 100644 tests/data/spec/issue216_scan1.spec
 create mode 100644 tests/data/spec/mca_spectra_example_scan1.spec
 create mode 100644 tests/data/spec/references.json
 create mode 100644 tests/data/spec/spec_from_spock_scan1.spec
 create mode 100644 tests/data/spec/startup_1_scan16.spec
 create mode 100644 tests/data/spec/twoc.dat
 create mode 100644 tests/data/spec/user6idd.dat
 create mode 100644 tests/data/xdi/.gitattributes
 create mode 100644 tests/data/xdi/BadFiles.txt
 create mode 100644 tests/data/xdi/SHA256SUMS
 create mode 100644 tests/data/xdi/SOURCES.txt
 create mode 100644 tests/data/xdi/bad_00.xdi
 create mode 100644 tests/data/xdi/bad_01.xdi
 create mode 100644 tests/data/xdi/bad_02.xdi
 create mode 100644 tests/data/xdi/bad_03.xdi
 create mode 100644 tests/data/xdi/bad_04.xdi
 create mode 100644 tests/data/xdi/bad_05.xdi
 create mode 100644 tests/data/xdi/bad_06.xdi
 create mode 100644 tests/data/xdi/bad_07.xdi
 create mode 100644 tests/data/xdi/bad_08.xdi
 create mode 100644 tests/data/xdi/bad_09.xdi
 create mode 100644 tests/data/xdi/bad_10.xdi
 create mode 100644 tests/data/xdi/bad_11.xdi
 create mode 100644 tests/data/xdi/bad_12.xdi
 create mode 100644 tests/data/xdi/bad_13.xdi
 create mode 100644 tests/data/xdi/bad_14.xdi
 create mode 100644 tests/data/xdi/bad_15.xdi
 create mode 100644 tests/data/xdi/bad_16.xdi
 create mode 100644 tests/data/xdi/bad_17.xdi
 create mode 100644 tests/data/xdi/bad_18.xdi
 create mode 100644 tests/data/xdi/bad_19.xdi
 create mode 100644 tests/data/xdi/bad_20.xdi
 create mode 100644 tests/data/xdi/bad_21.xdi
 create mode 100644 tests/data/xdi/bad_22.xdi
 create mode 100644 tests/data/xdi/bad_23.xdi
 create mode 100644 tests/data/xdi/bad_24.xdi
 create mode 100644 tests/data/xdi/bad_25.xdi
 create mode 100644 tests/data/xdi/bad_26.xdi
 create mode 100644 tests/data/xdi/bad_27.xdi
 create mode 100644 tests/data/xdi/bad_28.xdi
 create mode 100644 tests/data/xdi/bad_29.xdi
 create mode 100644 tests/data/xdi/bad_30.xdi
 create mode 100644 tests/data/xdi/bad_31.xdi
 create mode 100644 tests/data/xdi/bad_32.xdi
 create mode 100644 tests/data/xdi/bad_33.xdi
 create mode 100644 tests/data/xdi/bad_34.xdi
 create mode 100644 tests/data/xdi/bad_35.xdi
 create mode 100644 tests/data/xdi/nonxafs_1d.xdi
 create mode 100644 tests/data/xdi/nonxafs_2d.xdi
 create mode 100644 tests/data/xdi/nonxafs_negvalues.xdi
 create mode 100644 tests/support/spec_corpus.py
 create mode 100644 tests/validation/make_spec_corpus.py
 create mode 100644 tests/validation/test_spec_corpus.py
 create mode 100644 tests/validation/test_xdi_corpus.py

diff --git a/tests/data/spec/.gitattributes b/tests/data/spec/.gitattributes
new file mode 100644
index 0000000..6254495
--- /dev/null
+++ b/tests/data/spec/.gitattributes
@@ -0,0 +1 @@
+* -text
diff --git a/tests/data/spec/05_02_test_none.spec b/tests/data/spec/05_02_test_none.spec
new file mode 100644
index 0000000..6321a88
--- /dev/null
+++ b/tests/data/spec/05_02_test_none.spec
@@ -0,0 +1,87 @@
+#E 1556811209
+#D Thu May 02 10:33:29 2019
+#C BlueSky  user = usaxs  host = usaxscontrol.xray.aps.anl.gov
+
+#S 1  tune_mr()
+#D Thu May 02 10:34:16 2019
+#C Thu May 02 10:34:16 2019.  plan_type = generator
+#C Thu May 02 10:34:16 2019.  uid = 25fc1e3d-ad73-44e9-8ba0-9b72e28bf58b
+#MD APSTOOLS_VERSION = 1.1.0
+#MD BLUESKY_VERSION = 1.5.2
+#MD EPICS_CA_MAX_ARRAY_BYTES = 1280000
+#MD EPICS_HOST_ARCH = linux-x86_64
+#MD OPHYD_VERSION = 1.3.3
+#MD beamline_id = APS USAXS 9-ID-C
+#MD datetime = 2019-05-02 10:34:16.187669
+#MD login_id = usaxs@usaxscontrol.xray.aps.anl.gov
+#MD pid = 15855
+#MD proposal_id = testing Bluesky installation
+#MD purpose = tuner
+#MD tune_md = {'width': -0.004, 'initial_position': 8.824977, 'time_iso8601': '2019-05-02 10:34:16.190490'}
+#MD tune_parameters = {'num': 31, 'width': -0.004, 'initial_position': 8.824977, 'peak_choice': 'com', 'x_axis': 'm_stage_r', 'y_axis': 'I0_USAXS'}
+#N 31
+#L Epoch_float  Epoch  m_stage_r  m_stage_r_user_setpoint  m_stage_r_soft_limit_lo  m_stage_r_soft_limit_hi  seconds  I0_USAXS  I00_USAXS  PD_USAXS  TR diode  I000  scaler0_time  scaler0_display_rate
+2.0309338569641113 2 8.826977 8.826977000000001 -7.856115 37.143885 1000000.0 127.0 3142.0 590.0 1.0 0.0 0.1 5.0
+2.454244375228882 2 8.826844 8.826843666666667 -7.856115 37.143885 1000000.0 127.0 3143.0 568.0 1.0 0.0 0.1 5.0
+2.9033102989196777 3 8.826711 8.826710333333335 -7.856115 37.143885 1000000.0 127.0 3143.0 482.0 1.0 0.0 0.1 5.0
+3.321066379547119 3 8.826577 8.826577 -7.856115 37.143885 1000000.0 127.0 3143.0 551.0 1.0 0.0 0.1 5.0
+3.7377452850341797 4 8.826443999999999 8.826443666666668 -7.856115 37.143885 1000000.0 126.0 3143.0 471.0 1.0 0.0 0.1 5.0
+4.154853343963623 4 8.826311 8.826310333333334 -7.856115 37.143885 1000000.0 127.0 3143.0 504.0 1.0 0.0 0.1 5.0
+4.670650005340576 5 8.826177 8.826177000000001 -7.856115 37.143885 1000000.0 127.0 3143.0 539.0 1.0 0.0 0.1 5.0
+5.08653712272644 5 8.826044 8.826043666666667 -7.856115 37.143885 1000000.0 127.0 3142.0 913.0 1.0 0.0 0.1 5.0
+5.50264573097229 6 8.825911 8.825910333333335 -7.856115 37.143885 1000000.0 126.0 3143.0 2550.0 1.0 0.0 0.1 5.0
+5.9208080768585205 6 8.825776999999999 8.825777 -7.856115 37.143885 1000000.0 127.0 3143.0 550.0 1.0 0.0 0.1 5.0
+6.337219953536987 6 8.825644 8.825643666666668 -7.856115 37.143885 1000000.0 126.0 3143.0 505.0 1.0 0.0 0.1 5.0
+6.753763437271118 7 8.825510999999999 8.825510333333334 -7.856115 37.143885 1000000.0 127.0 3143.0 504.0 1.0 0.0 0.1 5.0
+7.271679639816284 7 8.825377 8.825377000000001 -7.856115 37.143885 1000000.0 127.0 3143.0 516.0 1.0 0.0 0.1 5.0
+7.670604944229126 8 8.825244 8.825243666666667 -7.856115 37.143885 1000000.0 127.0 3143.0 487.0 1.0 0.0 0.1 5.0
+8.086844682693481 8 8.825111 8.825110333333335 -7.856115 37.143885 1000000.0 126.0 3140.0 22097.0 1.0 0.0 0.1 5.0
+8.503994464874268 9 8.824977 8.824977 -7.856115 37.143885 1000000.0 127.0 3143.0 548.0 1.0 0.0 0.1 5.0
+8.92101788520813 9 8.824843999999999 8.824843666666666 -7.856115 37.143885 1000000.0 127.0 3143.0 496.0 1.0 0.0 0.1 5.0
+9.337961912155151 9 8.824711 8.824710333333334 -7.856115 37.143885 1000000.0 127.0 3143.0 484.0 1.0 0.0 0.1 5.0
+9.7379310131073 10 8.824577 8.824577 -7.856115 37.143885 1000000.0 126.0 3143.0 463.0 1.0 0.0 0.1 5.0
+10.168515920639038 10 8.824444 8.824443666666667 -7.856115 37.143885 1000000.0 127.0 3142.0 487.0 1.0 0.0 0.1 5.0
+10.599914073944092 11 8.824311 8.824310333333333 -7.856115 37.143885 1000000.0 127.0 3143.0 464.0 1.0 0.0 0.1 5.0
+11.021519660949707 11 8.824176999999999 8.824177 -7.856115 37.143885 1000000.0 127.0 3142.0 474.0 1.0 0.0 0.1 5.0
+11.437908411026001 11 8.824044 8.824043666666666 -7.856115 37.143885 1000000.0 127.0 3143.0 468.0 1.0 0.0 0.1 5.0
+11.879516124725342 12 8.823910999999999 8.823910333333334 -7.856115 37.143885 1000000.0 127.0 3143.0 488.0 1.0 0.0 0.1 5.0
+12.304490566253662 12 8.823777 8.823777 -7.856115 37.143885 1000000.0 127.0 3143.0 482.0 1.0 0.0 0.1 5.0
+12.721202850341797 13 8.823644 8.823643666666667 -7.856115 37.143885 1000000.0 127.0 3142.0 482.0 1.0 0.0 0.1 5.0
+13.149776220321655 13 8.823511 8.823510333333333 -7.856115 37.143885 1000000.0 127.0 3143.0 484.0 1.0 0.0 0.1 5.0
+13.570869207382202 14 8.823377 8.823377 -7.856115 37.143885 1000000.0 127.0 3142.0 478.0 1.0 0.0 0.1 5.0
+13.989897727966309 14 8.823243999999999 8.823243666666666 -7.856115 37.143885 1000000.0 126.0 3142.0 498.0 1.0 0.0 0.1 5.0
+14.388286590576172 14 8.823111 8.823110333333334 -7.856115 37.143885 1000000.0 125.0 3140.0 21889.0 1.0 0.0 0.1 5.0
+14.832243204116821 15 8.822977 8.822977 -7.856115 37.143885 1000000.0 127.0 3143.0 548.0 1.0 0.0 0.1 5.0
+#C Thu May 02 10:34:31 2019.  num_events_baseline = 2
+#C Thu May 02 10:34:31 2019.  num_events_primary = 31
+#C Thu May 02 10:34:31 2019.  exit_status = success
+
+#E 1556831722
+#D Thu May 02 16:15:22 2019
+#C BlueSky  user = usaxs  host = usaxscontrol.xray.aps.anl.gov
+
+#S 1  measure_USAXS_Transmission(detectors=['scaler0'], num=1)
+#D Thu May 02 16:15:58 2019
+#C Thu May 02 16:15:58 2019.  plan_type = generator
+#C Thu May 02 16:15:58 2019.  uid = 94d7506e-c584-47a8-ac3a-74a9e175492e
+#MD uid = 94d7506e-c584-47a8-ac3a-74a9e175492e
+#MD APSTOOLS_VERSION = 1.1.0
+#MD BLUESKY_VERSION = 1.5.2
+#MD EPICS_CA_MAX_ARRAY_BYTES = 1280000
+#MD EPICS_HOST_ARCH = linux-x86_64
+#MD OPHYD_VERSION = 1.3.3
+#MD beamline_id = APS USAXS 9-ID-C
+#MD detectors = ['scaler0']
+#MD login_id = usaxs@usaxscontrol.xray.aps.anl.gov
+#MD num_intervals = 0
+#MD num_points = 1
+#MD pid = 2497
+#MD proposal_id = testing Bluesky installation
+#MD purpose = issue 143
+#N 1
+#L Epoch_float  Epoch  seconds  I0_USAXS  I00_USAXS  PD_USAXS  TR diode  I000  scaler0_time  scaler0_display_rate  scaler0
+3.806389331817627 4 30000000.0 3724.0 94173.0 663193.0 1.0 0.0 3.0 5.0 None
+#C Thu May 02 16:16:02 2019.  num_events_baseline = 2
+#C Thu May 02 16:16:02 2019.  num_events_primary = 1
+#C Thu May 02 16:16:02 2019.  exit_status = success
+
diff --git a/tests/data/spec/20220311-161530_scan2.spec b/tests/data/spec/20220311-161530_scan2.spec
new file mode 100644
index 0000000..c6cc825
--- /dev/null
+++ b/tests/data/spec/20220311-161530_scan2.spec
@@ -0,0 +1,37 @@
+#E 1647036930
+#D Fri Mar 11 16:15:30 2022
+#C Bluesky  user = prjemian  host = zap
+#O0 
+#o0 
+
+#S 2  example(scaler='scaler1', positioner='m8', start_position=0, end_position=2, num_points=10, velocity=0.4)
+#D Fri Mar 11 16:19:58 2022
+#C Fri Mar 11 16:19:58 2022.  plan_type = generator
+#C Fri Mar 11 16:19:58 2022.  uid = 05eec9d5-85fc-480f-a7a5-361a9744a61e
+#MD uid = 05eec9d5-85fc-480f-a7a5-361a9744a61e
+#MD acquire_period = 0.5
+#MD beamline_id = Bluesky_training
+#MD expected_scan_time = 5.0
+#MD instrument_name = Bluesky Case Studies
+#MD login_id = prjemian@zap
+#MD pid = 396855
+#MD proposal_id = training
+#MD velocity = 100.0
+#MD versions = {'apstools': '1.6.1+2.g1de05de', 'bluesky': '1.8.2', 'databroker': '1.2.4', 'epics': '3.5.0', 'h5py': '3.6.0', 'intake': '0.6.3', 'matplotlib': '3.5.1', 'numpy': '1.21.2', 'ophyd': '1.6.3', 'pyRestTable': '2020.0.3', 'spec2nexus': '2021.1.11+41.g544065d.dirty'}
+#P0 
+#N 11
+#L Epoch_float  Epoch  m8  m8_user_setpoint  incremental_timebase  incremental_I0  incremental_scint  incremental_diode  incremental_I000  incremental_I00  incremental_scaler1_time
+0.7898800373077393 1 0.15 2.0 4000000.0 1.0 2.0 1.0 1.0 2.0 0.4
+1.354731559753418 1 0.39 2.0 5000000.0 3.0 2.0 4.0 3.0 2.0 0.5
+1.8804519176483154 2 0.59 2.0 6000000.0 3.0 3.0 3.0 3.0 3.0 0.6
+2.413005828857422 2 0.8300000000000001 2.0 5000000.0 2.0 2.0 1.0 1.0 2.0 0.5
+2.9500224590301514 3 1.03 2.0 6000000.0 2.0 1.0 4.0 3.0 3.0 0.6000000000000001
+3.4667885303497314 3 1.23 2.0 4000000.0 1.0 2.0 2.0 3.0 2.0 0.3999999999999999
+3.9784128665924072 4 1.43 2.0 6000000.0 3.0 4.0 3.0 3.0 3.0 0.6000000000000001
+4.490501165390015 4 1.6300000000000001 2.0 5000000.0 2.0 3.0 3.0 3.0 1.0 0.49999999999999956
+5.016589164733887 5 1.87 2.0 5000000.0 3.0 2.0 1.0 2.0 3.0 0.5
+5.54512357711792 6 2.0 2.0 5000000.0 2.0 3.0 3.0 2.0 3.0 0.5
+#C Fri Mar 11 16:20:04 2022.  num_events_baseline = 2
+#C Fri Mar 11 16:20:04 2022.  num_events_primary = 10
+#C Fri Mar 11 16:20:04 2022.  exit_status = success
+
diff --git a/tests/data/spec/33id_spec_mesh_escan.spec b/tests/data/spec/33id_spec_mesh_escan.spec
new file mode 100644
index 0000000..b12e5a2
--- /dev/null
+++ b/tests/data/spec/33id_spec_mesh_escan.spec
@@ -0,0 +1,1168 @@
+#E 1058427452
+#D Thu Jul 17 02:37:32 2003
+#C psic  User = epix
+#H0  SR_current     SR_fill   SR_status     SR_mode       SR_fb      SR_fbH      SR_fbV    SR_topUp  barometer_mbar
+#H1  DCM_energy        ID_E   ID_taperE
+#H2      ID_gap        ID_E  ID_harmonic  ID_taperGap   ID_taperE
+#H3   SR_BPM_HP   SR_BPM_VP   SR_BPM_HA   SR_BPM_VA  DCM_energy  DCM_lambda  DCM_theta0  DCM_thetaEnc  ID_E_Offset  COUPLE_ID_to_DCM    DCM_mode  DCM_omega2
+#H4    FB_o2_on     FB_o2_r    FB_o2_sp
+#H5  Mirr1_angle     Mirr1_y  Mirr1_stripe
+#H6  Mirr2_angle     Mirr2_y  Mirr2_stripe
+#H7      D3_pos      D3_VDC     D3_gain     D3_bias     D3_time    D3_suppr     D3_dark     D3_Amps
+#H8  PF4_thickAl  PF4_thickTi   PF4_trans  PF4_bladeA1  PF4_bladeA2  PF4_bladeA3  PF4_bladeA4  PF4_bladeB1  PF4_bladeB2  PF4_bladeB3  PF4_bladeB4
+#H9  jfk_sclr_auto
+#H10      I0_VDC     I0_gain     I0_bias     I0_time    I0_suppr     I0_dark     I0_Amps
+#H11     I00_VDC    I00_gain    I00_bias    I00_time   I00_suppr    I00_dark    I00_Amps
+#H12     PIN_VDC    PIN_gain    PIN_bias    PIN_time   PIN_suppr    PIN_dark    PIN_Amps
+#H13   JFK540_i0   JFK540_i1   JFK540_i2   JFK540_i3   JFK540_i4   JFK540_i5   JFK540_i6   JFK540_i7
+#H14   JFK540_i8   JFK540_i9  JFK540_i10  JFK540_i11  JFK540_i12  JFK540_i13  JFK540_i14  JFK540_i15
+#H15   JFK540_o0   JFK540_o1   JFK540_o2   JFK540_o3
+#H16       HSC1t       HSC1l       HSC1b       HSC1r       HSC1h       HSC1v      HSC1h0      HSC1v0
+#H17       HSC2t       HSC2l       HSC2b       HSC2r       HSC2h       HSC2v      HSC2h0      HSC2v0
+#H18       HSC3t       HSC3l       HSC3b       HSC3r       HSC3h       HSC3v      HSC3h0      HSC3v0
+#H19       HSC4t       HSC4l       HSC4b       HSC4r       HSC4h       HSC4v      HSC4h0      HSC4v0
+#H20       dark1       dark2       dark3       dark4       dark5       dark6       dark7       dark8       dark9      dark10      dark11      dark12      dark13      dark14      dark15      dark16  darkToTime  darkCoTime    darkRing
+#O0    delta       eta       chi       phi        nu        mu    slitwt    slitwl
+#O1   slitwb    slitwr  DCM theta    slitmt    slitml    slitmb    slitmr      kPhi
+#O2    kappa      kEta    aTheta   a2Theta   sampleX   sampleY   sampleZ  ana.theta
+#O3  ana.chi  ion_ch_vert        mr  
+
+#S 22  mesh  eta 57 57.1 10  chi 90.9 91 10  1
+#D Thu Jul 17 03:30:31 2003
+#T 1  (seconds)
+#G0 0 0 0 0 0 1 0 0 0 0 0 0 50 0 0 0 1 0 0 0 0
+#G1 3.825 3.888 11.704 90 90 90 1.64266 1.61605 0.536841 90 90 90 0 0 12 1 0 11 90.2448 44.607 89.08 26.8835 0.002 0 84.7493 43.836 73.67 26.8035 0.002 0 1.38221 1.38098
+#G2 0
+#Q 0.0108247 0.999126 11.0071
+#P0 84.626698 56.974 90.9395 26.6505 0.0020000001 0 0.2802114 0.80000004
+#P1 1.059723 0.72000003 12.72134 7.0500874 1.4247812 -2.9502166 2.4003 85.187004
+#P2 137.0569 115.5105 0 0 2.09105 1.380002 25.205902 -0.53981253
+#P3 -2.5907501 33.200975 10.24533 
+#C psic
+#V0 101.983 56 1 4 1 1 1 1 992.552
+#V1 8.98008 9.03679 0.000353813
+#V2 20.1478 9.03679 1 0.000569699 0.000353813
+#V3 0 0 0 0 8.98008 1.38066 -0.426683 12.7183 0.06 1 0 0.00581832
+#V4 0 -0.0172157 0
+#V5 3.99996 19.22 3
+#V6 3.90751 30.2481 3
+#V7 1 -1 1000000000 0 7 1e-12 0 -1e-09
+#V8 1.1177 0 2.54832e-05 1 1 1 0 0 0 0 0
+#V9 1
+#V10 -0.00732601 428 0 28 2 1236.86 -1.71168e-05
+#V11 0.021978 428 0 28 2 858.562 5.13505e-05
+#V12 0.017094 428 0 28 2 368.906 3.99393e-05
+#V13 0.251526 -0.026862 -0.026862 -0.00732601 0.021978 0.017094 -0.01221 -0.002442
+#V14 10 0.163614 -10 -1.92186 0.002442 -0.026862 -0.031746 0.017094
+#V15 4.585 5 6.0875 3.24
+#V16 0 0 0 0 0 0 0 0
+#V17 0.2 0.05 0.2 0.35 0.4 0.4 0.15 0
+#V18 2.5 2.5 2.5 2.5 5 5 0 0
+#V19 0.2 0.2 0.2 0.2 0.4 0.4 0 0
+#V20 1000000 0 0.0208333 368.906 1236.86 858.562 0.0208333 1 0 0 0 0 0 0 0 0 96 97 100
+#N 15
+#L eta  chi  H  K  L  elastic  Kalpha  Epoch  seconds  signal  I00  harmonic  signal2  I0  I0
+#@MCA 16C
+#@CHANN 1201 1110 1200 1
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+56.9965 90.9 0.0134687 1.00022 11.0062 4 0 3182 1 3 964 3 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.009 90.9 0.0135691 1.00101 11.0055 6 0 3184 1 4 961 4 0 1229 1229
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0185 90.9 0.0136517 1.00161 11.005 7 0 3187 1 6 963 7 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.028 90.9 0.0137343 1.00221 11.0045 5 1 3189 1 17 963 17 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.037 90.9 0.0138125 1.00278 11.0041 45 0 3192 1 36 962 36 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.047 90.9 0.0138995 1.00342 11.0035 15 0 3194 1 32 963 32 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.057 90.9 0.0139864 1.00405 11.003 19 0 3197 1 28 963 28 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0675 90.9 0.0140777 1.00471 11.0025 4 0 3199 1 14 964 15 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0785 90.9 0.0141733 1.00541 11.0019 9 0 3202 1 8 957 8 0 1226 1226
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0905 90.9 0.0142776 1.00617 11.0013 11 0 3205 1 7 963 7 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.095 90.9 0.0143168 1.00645 11.001 11 0 3207 1 11 961 11 0 1230 1230
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.001 90.9105 0.0128609 1.00059 11.0059 13 0 3210 1 13 963 13 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.008 90.9105 0.01293 1.00104 11.0055 5 0 3212 1 13 963 13 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0225 90.9105 0.0130562 1.00195 11.0048 22 0 3215 1 23 963 23 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.028 90.9105 0.013104 1.0023 11.0045 13 0 3217 1 27 961 27 0 1229 1229
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.038 90.9105 0.013191 1.00293 11.004 97 0 3220 1 102 964 102 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.046 90.9105 0.0132606 1.00344 11.0035 40 0 3222 1 65 964 65 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0585 90.9105 0.0133693 1.00423 11.0029 38 0 3225 1 29 959 29 0 1227 1227
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.066 90.9105 0.0134346 1.0047 11.0025 10 0 3227 1 24 964 24 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0785 90.9105 0.0135433 1.00549 11.0018 18 0 3230 1 17 961 17 0 1228 1228
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0865 90.9105 0.0136129 1.006 11.0014 29 2 3233 1 22 963 22 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.101 90.9105 0.013739 1.00691 11.0007 15 0 3235 1 17 964 17 0 1233 1233
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0025 90.921 0.0122601 1.00077 11.0057 16 0 3238 1 13 956 13 0 1225 1225
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0065 90.921 0.0122949 1.00103 11.0055 16 0 3240 1 19 963 19 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.016 90.921 0.0123776 1.00163 11.005 18 0 3242 1 51 963 51 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.027 90.921 0.0124733 1.00232 11.0045 115 0 3245 1 127 963 127 1 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.04 90.921 0.0125865 1.00314 11.0038 165 0 3247 1 230 964 231 1 1233 1233
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.051 90.921 0.0126822 1.00384 11.0032 211 0 3250 1 165 963 165 3 1233 1233
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0585 90.921 0.0127475 1.00431 11.0028 95 0 3252 1 92 964 93 0 1233 1233
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.071 90.921 0.0128563 1.0051 11.0022 28 0 3254 1 66 964 67 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0815 90.921 0.0129476 1.00577 11.0016 46 0 3257 1 42 960 42 0 1229 1229
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.088 90.921 0.0130042 1.00618 11.0013 30 0 3259 1 44 957 44 0 1225 1225
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.102 90.921 0.0131261 1.00706 11.0005 9 0 3261 1 26 962 26 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+56.9895 90.9305 0.0115789 1.00003 11.0064 67 0 3264 1 80 963 80 0 1231 1231
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+57.0095 90.9305 0.0117448 1.00129 11.0053 153 1 3267 1 126 963 126 0 1232 1232
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+
+#S 105  Escan 8.98 9.01 30 5
+#D Thu Jul 17 10:29:01 2003
+#T 5  (seconds)
+#G0 0 0 0 1 0 0 0 0 0 0 0 0 50 0 0 0 2 1 2 0 0
+#G1 3.825 3.876 11.697 90 90 90 1.64266 1.62105 0.537162 90 90 90 0 0 12 0 1 11 90.1998 44.668 89.05 26.37 0.002 0 84.6301 57.0375 90.9595 26.639 0.002 0 1.38098 1.38098
+#G2 0
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+#P0 90.241998 46.0125 89.127 33.6595 0.0020000001 0 0.2802114 0.80000004
+#P1 1.059723 0.72000003 12.718459 7.0500874 1.4247812 -2.9502166 2.4003 89.391004
+#P2 132.6969 101.7443 0 0 2.039999 1.290003 25.188802 -0.53981253
+#P3 -2.5907501 33.200975 10.24533 
+#C psic
+#V0 101.138 56 1 4 1 1 1 1 993.068
+#V1 8.98006 9.03679 0.000353813
+#V2 20.1478 9.03679 1 0.000569699 0.000353813
+#V3 0 0 0 0 8.98006 1.38066 -0.426683 12.7183 0.06 1 0 0.00581832
+#V4 0 -0.0161874 0
+#V5 3.99996 19.22 3
+#V6 3.90751 30.2481 3
+#V7 1 -1 1000000000 0 7 1e-12 0 -1e-09
+#V8 0 0 1 0 0 0 0 0 0 0 0
+#V9 1
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+#V11 0.481074 428 0 28 2 843.583 0.00112401
+#V12 1.65812 428 0 28 2 374.521 0.00387411
+#V13 0.266178 0.046398 -0.021978 -0.002442 0.481074 1.65812 -0.01221 -0.00732601
+#V14 10 0.153846 -10 -1.9072 0.026862 -0.00732601 -0.01221 0.046398
+#V15 4.585 5 6.0875 3.24
+#V16 0 0 0 0 0 0 0 0
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+#V18 2.5 2.5 2.5 2.5 5 5 0 0
+#V19 0.2 0.2 0.2 0.2 0.4 0.4 0 0
+#V20 1000000 0 0.0104167 374.521 1221.28 843.583 0.0208333 1.01042 0 0 0 0 0 0 0 0 97 97 100
+#N 15
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+8.994 12.698331 12.921432 8.9948546 9.0528998 3937 14649 28383 5 19847 952258 19966 56 978526 978526
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+8.995 12.696896 12.92005 8.9958248 9.0543694 4307 16950 28389 5 23426 953725 23518 67 1.03894e+06 1.03894e+06
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+8.996 12.695463 12.918761 8.9967233 9.0548325 4432 17121 28395 5 25030 953317 25127 83 1.00792e+06 1.00792e+06
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+8.997 12.694027 12.917162 8.9978305 9.056459 4315 17717 28401 5 26698 954311 26845 79 1.0196e+06 1.0196e+06
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+8.998 12.692592 12.915729 8.9988229 9.0570784 4422 16904 28407 5 26627 954029 26695 91 1.02758e+06 1.02758e+06
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+8.999 12.691159 12.914367 8.9997868 9.0580068 4572 17994 28414 5 23390 955191 23507 89 955452 955452
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+9 12.689726 12.912924 9.0008012 9.0591679 4459 17229 28420 5 23556 955240 23632 81 1.00482e+06 1.00482e+06
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.002 12.686858 12.910077 9.0027804 9.0613337 4085 15790 28432 5 23291 954870 23405 65 996181 996181
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.003 12.685427 12.908623 9.0037956 9.0615616 3941 14789 28438 5 22505 955978 22632 71 944582 944582
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.004 12.683994 12.907221 9.0047534 9.063344 4697 18168 28444 5 22925 955672 23031 61 955139 955139
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.005 12.682561 12.905766 9.0057618 9.0636544 4433 17459 28451 5 22788 957567 22898 68 980532 980532
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.006 12.681131 12.904385 9.006756 9.0655847 4195 15616 28457 5 21589 956404 21681 76 973505 973505
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+9.007 12.679698 12.902972 9.0077505 9.0663581 3869 14419 28463 5 20687 957238 20779 70 964754 964754
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+ 0 0 0 0 0 0 0 0 0 0 0 
+9.008 12.678268 12.901528 9.0087452 9.066824 3615 13408 28469 5 19834 957287 19927 56 926297 926297
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 
+9.009 12.676837 12.900146 9.0097185 9.0686774 3552 13180 28475 5 20479 957310 20586 65 955660 955660
+@A 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\
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+ 0 0 0 0 0 0 0 0 0 0 0 
+9.01 12.675407 12.898692 9.0107424 9.0692949 4350 16202 28482 5 20832 955756 20937 65 977196 977196
+#C Thu Jul 17 10:32:47 2003.  0.
+
diff --git a/tests/data/spec/CdSe_scan92.spec b/tests/data/spec/CdSe_scan92.spec
new file mode 100644
index 0000000..acefe30
--- /dev/null
+++ b/tests/data/spec/CdSe_scan92.spec
@@ -0,0 +1,81 @@
+#E 1403098354
+#D Wed Jun 18 08:32:34 2014
+#C herix  User = ixs
+#H0  SR_current  SR_status  barometer_mbar
+#H1  Q_Angstrom  Q_nm  Q_au
+#H2  T_Sample  T_Control
+#H3  RV_B1  RV_B2  RV_B3
+#O0 HerixTTH        th       chi       phi  WBSlitV_B  WBSlitH_R  WBSlitV_T  WBSlitH_L
+#O1    CRL_Y     CRL_X    BIM1_X    CRL_AX  HHLMTheta   HHLM_Y1   HHLM_Z2  HHLMTheta2
+#O2  HHLM_X2  HHLM_Chi2   HHLM_XT   HHLM_YT  BSlitV-DW  BSlitV-UP  BSlitH-Out  BSlitH-In
+#O3    secth      secy      secx    CRL_AY     wbsvg     wbsvc     wbshg     wbshc
+#O4    bslvg     bslvc     bslhg     bslhc    KohzuE    HRM_X1    HRM_X2    HRM_X3
+#O5  HRM_th1   HRM_th2   HRM_th3    HRM_y1    HRM_y2    HRM_y3  HRM_tilt1  HRM_tilt3
+#O6 HRM_Mini1  HRM_Mini2      s2th     cam-x     cam-y     focus     atten     stbly
+#O7    stblx     stblz     slity     slitx    cam_AX        xu        zu        yu
+#O8       xd        yd    HerixX    HerixY    HerixZ   HerixAX   HerixAY    HerixE
+#O9     a1ax      a1ay      a2ax      a2ay      a3ax      a3ay      a4ax      a4ay
+#O10     a5ax      a5ay      a6ax      a6ay      a7ax      a7ay      a8ax      a8ay
+#O11     a9ax      a9ay  cslit_vd  cslit_vu  cslit_ho  cslit_hi   micro_y   micro_x
+#O12   rbs_xy   micro_z     cslvg     cslvc     cslhg     cslhc   HM_PZT1   HM_PZT2
+#O13  HM_PZT3       pzt  Motor 169     b2vup   b2vdown  Motor 172     b2hin  Motor 174
+#O14   b2hout  Motor 176    b2slvg    b2slvc    b2slhg    b2slhc  Slit ana5  PIN ana5
+#O15    FPD X  Zoom Cam    cam_AY    Ruby_X      B-th     B-phi   B-mic_x   B-mic_z
+#O16  B-mic_y     mslvg     mslvc     mslhg     mslhc  MslitV-D  MslitV-U  MslitH-O
+#O17 MslitH-I  NRS Energy  
+
+#S 92  ascan  herixE -10.1049 -0.104865  40 1
+#D Wed Jun 18 22:07:21 2014
+#T 1  (Seconds)
+#G0 0 0 0 0 0 1 0 0 0 0 0 0 50 0 0.1 0 68 68 50 -1 1 1 3.13542 3.13542 0 463.6 838.8
+#G1 6.05131 6.05131 8.61732 90 90 90 1.0383182 1.0383182 0.7291344997 90 90 90 2 2 2 0 0 4 15.675 7.83755 -45.354325 7.751 0 0 13.934 6.96705 18.0743 9.1535 0 0 0.52262 0.52262
+#G3 0.3413674584 0.1164640551 0.6837280964 -0.7028286997 0.7480011812 0.1102087 -0.6838163217 -0.7106581748 0.2280505455
+#G4 -0.0001742409426 -0.0001832041572 -0.001093373102 0.52262 0.09723621638 -0.1010355329 0 90.31695874 0 0 0 0 0 0 0 0 -180 -180 -180 -180 -180 -180 -180 -180 -180 0
+#Q -0.000174241 -0.000183204 -0.00109337
+#P0 -0.004 0 0 9.259 0.450009 0.903125 0.830025 -0.828125
+#P1 3.310273 2.3 -2.5e-05 0.2064 7.2994566 -12.60214 98.38204 0.80799961
+#P2 -0.73 15.878812 14.88 42 0.33 1.03 3.1 -1.9
+#P3 85.693475 83.0873 -25.49 0 0.38 0.64 1.7315 0.0375
+#P4 0.7 0.68 5 0.6 23.692796 30.04 47.4 28.66
+#P5 18952.856 -31656.325 13974.275 -10.202 -183.5 -23.7 0.63036 -0.22032
+#P6 1689.6308 1491.14 21.99 2.06 -1.03 -2.83 5 -0.121255
+#P7 -0.34 -0.2 0.204992 1.011 -5.05 -0.3625 -5.79 18.318238
+#P8 68.439 41.175517 -31.8 42.7 -1.544 4.29 13.435 -5.1048648
+#P9 0.4394 0.92812 -3.4181 -3.36967 -1.2696 0.68363 -55.68851 4.29504
+#P10 -99.662 12.94 -20.9481 0.8789 24.21968 -16.65109 -4.88304 4.05286
+#P11 -0.63518 -5.61544 5.641875 6.641875 7.495 5.49488 2.37 2.4001
+#P12 -4.4398827 0.5 1 6.142 2 6.495 1.22 66
+#P13 42.3 -0.1422 48.475 4.55 3.55 2.0001 1.5001 -1.9999
+#P14 -1.4999 -0.9 1 4.05 -3 0 15.1 75
+#P15 0 17.8 2.352 -114.77 0 -15 0.2398 1.69972
+#P16 -0.499945 0.155 -7.3295 2 6.6705 -7.407 -7.252 7.6705
+#P17 5.6705 -181680.09 
+#C herix
+#V0 102.005 1 986.747
+#V1 -0.000839327 -0.00839327 -0.000444153
+#V2 297.466 300
+#V3 1.64e-05 0.000144 3.96e-06
+#N 55
+#L HerixE  H  K  L  T_control_LS340  T_sample_LS340  HRMpzt1  HRMTh3_enc  HRMTh2_enc  HRMTh1_enc  HRMth1  HRMth2  HRMTemp1  HRMTemp2  HRMTemp3  HRMTemp4  HRMTemp5  HRMTemp6  fdbk_hhl  fdbk_hrm  NRS_keV  An9_Temp  An8_Temp  An7_Temp  An6_Temp  An5_Temp  An4_Temp  An3_Temp  An2_Temp  An1_Temp  Epoch  HM_IC1  HM_IC2  PIN-B  HM_IC3  APD1A_I0  APD4  Ana9  Ana8  Ana7  Ana6  Ana5  Ana4  Ana3  Ana2  Ana1  ICO-C  PIN-D  PIN-C  IN-P  IN-D  FWD-P  FWD-D  Seconds  Seconds
+-10.118571 -0.000174241 -0.000183204 -0.00109337 298.597 297.467 66 0 3485 0 18952.856 -31658.349 297.081 296.872 124.593 124.578 296.977 296.906 0.516518 -0.0727855 23.6983 24.3961 24.3902 24.4237 24.4187 24.4345 24.5206 24.4144 24.3745 24.412 48889 16440 88968 47 56465 16213 0 0 0 0 0 22 0 0 0 0 586 1 434 0 0 0 0 1 1
+-9.8450964 -0.000174241 -0.000183204 -0.00109337 298.599 297.47 66 0 3483 0 18952.856 -31658.24 297.081 296.872 124.593 124.578 296.977 296.906 0.516823 -0.0764477 23.6983 24.3961 24.3877 24.4219 24.4166 24.436 24.5167 24.4165 24.3751 24.4168 48890 16480 89435 46 57203 16162 0 0 0 0 0 17 0 0 0 0 587 1 435 0 0 0 0 1 1
+-9.6020076 -0.000174241 -0.000183204 -0.00109337 298.599 297.47 66 0 3481 0 18952.856 -31658.143 297.081 296.872 124.593 124.578 296.977 296.906 0.516518 -0.0773632 23.6983 24.396 24.3877 24.4219 24.4166 24.436 24.5167 24.4165 24.3751 24.4168 48892 16463 89345 45 54604 16207 0 0 0 0 0 39 0 0 0 0 589 1 435 0 0 0 0 1 1
+-9.3589188 -0.000174241 -0.000183204 -0.00109337 298.599 297.471 66 0 3478 0 18952.856 -31658.046 297.081 296.872 124.593 124.578 296.977 296.906 0.516518 -0.078584 23.6983 24.396 24.3877 24.4219 24.4166 24.436 24.5167 24.4165 24.3751 24.4168 48893 16434 89106 46 57329 16448 0 0 0 0 0 36 0 0 0 0 585 1 435 0 0 0 0 1 1
+-9.11583 -0.000174241 -0.000183204 -0.00109337 298.6 297.472 66 0 3477 0 18952.856 -31657.949 297.081 296.871 124.596 124.574 296.977 296.906 0.516518 -0.0773632 23.6983 24.396 24.3877 24.4219 24.4166 24.436 24.5172 24.4115 24.3717 24.4163 48895 16464 89261 46 57183 16209 0 0 0 0 0 54 0 0 0 0 591 1 435 0 0 0 0 1 1
+-8.8423551 -0.000174241 -0.000183204 -0.00109337 298.601 297.473 66 0 3474 0 18952.856 -31657.828 297.081 296.871 124.596 124.574 296.977 296.906 0.516518 -0.0770581 23.6983 24.3971 24.3918 24.4208 24.4197 24.4325 24.5172 24.4115 24.3717 24.4163 48896 16424 89048 46 56548 16362 0 0 0 0 0 85 0 0 0 0 587 1 435 0 0 0 0 1 1
+-8.5992663 -0.000174241 -0.000183204 -0.00109337 298.601 297.473 66 0 3471 0 18952.856 -31657.731 297.081 296.871 124.596 124.574 296.977 296.906 0.516518 -0.0773632 23.6983 24.3971 24.3918 24.4208 24.4197 24.4325 24.5172 24.4115 24.3717 24.4163 48897 16468 89221 46 57113 16288 0 0 0 0 0 129 0 0 0 0 592 1 436 0 0 0 0 1 1
+-8.3561775 -0.000174241 -0.000183204 -0.00109337 298.603 297.476 66 0 3469 0 18952.856 -31657.634 297.081 296.871 124.596 124.574 296.977 296.906 0.516823 -0.0767529 23.6983 24.3971 24.3918 24.4208 24.4197 24.4325 24.5172 24.4115 24.3717 24.4163 48899 16454 89113 46 56583 16093 0 0 0 0 0 161 0 0 0 0 589 1 435 0 0 0 0 1 1
+-8.1130887 -0.000174241 -0.000183204 -0.00109337 298.605 297.479 66 0 3467 0 18952.856 -31657.537 297.081 296.872 124.597 124.579 296.977 296.906 0.516213 -0.0764477 23.6983 24.3971 24.3884 24.4258 24.4179 24.4358 24.5212 24.4106 24.3701 24.4207 48900 16466 89325 46 57282 16529 0 0 0 0 0 289 0 0 0 0 590 1 434 0 0 0 0 1 1
+-7.8699999 -0.000174241 -0.000183204 -0.00109337 298.606 297.479 66 0 3465 0 18952.856 -31657.44 297.081 296.872 124.597 124.579 296.977 296.907 0.516518 -0.0755322 23.6983 24.3953 24.3884 24.4258 24.4179 24.4358 24.5212 24.4106 24.3701 24.4207 48902 16414 89023 46 56843 16131 0 0 0 0 0 498 0 0 0 0 590 1 435 0 0 0 0 1 1
+-7.596525 -0.000174241 -0.000183204 -0.00109337 298.606 297.479 66 0 3463 0 18952.856 -31657.331 297.081 296.872 124.597 124.579 296.977 296.907 0.516518 -0.0770581 23.6983 24.3953 24.3884 24.4258 24.4179 24.4358 24.5212 24.4106 24.3701 24.4207 48903 16422 88927 46 56547 16152 0 0 0 0 0 803 0 0 0 0 584 1 436 0 0 0 0 1 1
+-7.3534362 -0.000174241 -0.000183204 -0.00109337 298.607 297.48 66 0 3460 0 18952.856 -31657.234 297.081 296.872 124.597 124.579 296.977 296.907 0.516518 -0.0758373 23.6983 24.3953 24.3884 24.4258 24.4179 24.4358 24.5212 24.4106 24.3728 24.419 48904 16369 88620 46 55906 16201 0 0 0 0 0 970 0 0 0 0 584 1 436 0 0 0 0 1 1
+-7.1103474 -0.000174241 -0.000183204 -0.00109337 298.607 297.481 66 0 3458 0 18952.856 -31657.137 297.081 296.874 124.595 124.577 296.977 296.907 0.516518 -0.0773632 23.6983 24.3931 24.3894 24.4239 24.4222 24.4331 24.5217 24.4145 24.3728 24.419 48906 16362 88525 46 56979 16237 0 0 0 0 0 1097 0 0 0 0 584 1 435 0 0 0 0 1 1
+-6.8672586 -0.000174241 -0.000183204 -0.00109337 298.607 297.481 66 0 3456 0 18952.856 -31657.028 297.081 296.874 124.595 124.577 296.976 296.906 0.516823 -0.0764477 23.6983 24.3931 24.3894 24.4239 24.4222 24.4331 24.5217 24.4145 24.3728 24.419 48907 16398 88607 46 57157 16201 0 0 0 0 0 1061 0 0 0 0 584 1 434 0 0 0 0 1 1
+-6.5937837 -0.000174241 -0.000183204 -0.00109337 298.609 297.482 66 0 3453 0 18952.856 -31656.919 297.081 296.874 124.595 124.577 296.976 296.906 0.516518 -0.0749218 23.6983 24.3931 24.3894 24.4239 24.4222 24.4331 24.5217 24.4145 24.3728 24.419 48909 16444 89164 45 54739 16097 0 0 0 0 0 865 0 0 0 0 593 1 435 0 0 0 0 1 1
+-6.3506949 -0.000174241 -0.000183204 -0.00109337 298.61 297.481 66 0 3451 0 18952.856 -31656.822 297.081 296.874 124.595 124.577 296.976 296.906 0.516213 -0.0782788 23.6983 24.3931 24.3894 24.4201 24.4179 24.4387 24.5192 24.4145 24.3717 24.4175 48910 16440 89100 45 57104 16424 0 0 0 0 0 621 0 0 0 0 595 1 435 0 0 0 0 1 1
+-6.1076061 -0.000174241 -0.000183204 -0.00109337 298.61 297.481 66 0 3449 0 18952.856 -31656.725 297.08 296.877 124.595 124.577 296.976 296.906 0.516213 -0.0758373 23.6983 24.3955 24.3909 24.4201 24.4179 24.4387 24.5192 24.4145 24.3717 24.4175 48911 16463 89397 46 56243 16334 0 0 0 0 0 448 0 0 0 0 589 1 435 0 0 0 0 1 1
+-5.8645173 -0.000174241 -0.000183204 -0.00109337 298.611 297.482 66 0 3446 0 18952.856 -31656.628 297.08 296.877 124.594 124.576 296.977 296.906 0.516213 -0.0755322 23.6983 24.3955 24.3909 24.4201 24.4179 24.4387 24.5192 24.4145 24.3717 24.4175 48913 16474 89423 46 57527 16119 0 0 0 0 0 257 0 0 0 0 581 1 435 0 0 0 0 1 1
+-5.5910424 -0.000174241 -0.000183204 -0.00109337 298.612 297.483 66 0 3444 0 18952.856 -31656.519 297.08 296.877 124.594 124.576 296.977 296.906 0.516518 -0.0737011 23.6983 24.3955 24.3909 24.4201 24.4179 24.4387 24.5192 24.4145 24.3746 24.4121 48914 16422 89168 46 56750 16293 0 0 0 0 0 129 0 0 0 0 585 1 435 0 0 0 0 1 1
+-5.3479536 -0.000174241 -0.000183204 -0.00109337 298.612 297.483 66 0 3442 0 18952.856 -31656.422 297.08 296.877 124.594 124.576 296.977 296.906 0.516518 -0.0740063 23.6983 24.394 24.3907 24.4263 24.4145 24.4363 24.5188 24.4094 24.3746 
+24.4121 48916#C Wed Jun 18 22:07:51 2014.  Scan aborted after 19 points.
+
diff --git a/tests/data/spec/EXAFS_Cu.dat b/tests/data/spec/EXAFS_Cu.dat
new file mode 100644
index 0000000..986d857
--- /dev/null
+++ b/tests/data/spec/EXAFS_Cu.dat
@@ -0,0 +1,1469 @@
+#F D:/Cu-EXAFS.dat
+#D Mon Jun 04 14:15:57 2012
+
+#S 1 cu.dat 1.1 Column 2
+#D Mon Jun 04 14:15:57 2012
+#N 2
+#L Column 1  Column 2
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+9846.879  2.345471
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+9871.171  2.328152
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+9879.305  2.322538
+9882.021  2.320753
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+9895.627  2.312761
+9898.354  2.31109
+9901.083  2.309253
+9903.814  2.307422
+9906.549  2.306022
+9909.283  2.304456
+9912.02  2.302554
+9914.759  2.300828
+9917.5  2.298976
+9920.244  2.297728
+9922.989  2.295886
+9925.735  2.29418
+9928.483  2.292394
+9931.235  2.290698
+9933.987  2.289377
+9936.741  2.287191
+9939.499  2.285261
+9942.257  2.28363
+9945.018  2.281959
+9947.778  2.279918
+9950.543  2.278504
+9953.309  2.276929
+9956.076  2.275114
+9958.846  2.273629
+9961.617  2.271824
+9964.391  2.270231
+9967.165  2.26831
+9969.943  2.266602
+9972.721  2.264979
+9975.502  2.263324
+9978.284  2.262075
+
diff --git a/tests/data/spec/LICENSE-pymca.txt b/tests/data/spec/LICENSE-pymca.txt
new file mode 100644
index 0000000..3fe5313
--- /dev/null
+++ b/tests/data/spec/LICENSE-pymca.txt
@@ -0,0 +1,29 @@
+ The PyMca X-Ray Fluorescence Toolkit is Copyright (C) 2004-2023 of the European Synchrotron Radiation Facility (ESRF).
+
+Unless otherways stated in the relevant accompanying source code, the default license of these modules is MIT.
+
+If you develop and distribute software using modules accessing Qt by means of Riverbank Computing PyQt4, PyQt5 or PyQt6, you will be conditioned by the license of your PyQt4/5/6 software (GPL or commercial). If you wish to be free of any distribution condition, you should be able to use PySide2 or PySide6 because it uses the LGPL license.
+
+If, despite its permisivity, the license accompanying any of the PyMca modules is not convenient for you, please contact industry@esrf.fr
+
+The MIT license follows:
+
+Copyright (c) 2004-2022 European Synchrotron Radiation Facility (ESRF)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
diff --git a/tests/data/spec/LICENSE-spec2nexus.txt b/tests/data/spec/LICENSE-spec2nexus.txt
new file mode 100644
index 0000000..4dd023d
--- /dev/null
+++ b/tests/data/spec/LICENSE-spec2nexus.txt
@@ -0,0 +1,95 @@
+Creative Commons Attribution 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+
+Section 1 -- Definitions.
+
+    Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.
+    Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.
+    Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.
+    Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.
+    Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.
+    Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.
+    Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.
+    Licensor means the individual(s) or entity(ies) granting rights under this Public License.
+    Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.
+    Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.
+    You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.
+
+Section 2 -- Scope.
+
+    License grant.
+        Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:
+            reproduce and Share the Licensed Material, in whole or in part; and
+            produce, reproduce, and Share Adapted Material.
+        Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.
+        Term. The term of this Public License is specified in Section 6(a).
+        Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a)(4) never produces Adapted Material.
+        Downstream recipients.
+            Offer from the Licensor -- Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.
+            No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.
+        No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).
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+    Other rights.
+        Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.
+        Patent and trademark rights are not licensed under this Public License.
+        To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties.
+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the following conditions.
+
+    Attribution.
+
+        If You Share the Licensed Material (including in modified form), You must:
+            retain the following if it is supplied by the Licensor with the Licensed Material:
+                identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);
+                a copyright notice;
+                a notice that refers to this Public License;
+                a notice that refers to the disclaimer of warranties;
+                a URI or hyperlink to the Licensed Material to the extent reasonably practicable;
+            indicate if You modified the Licensed Material and retain an indication of any previous modifications; and
+            indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.
+        You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.
+        If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.
+        If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.
+
+Section 4 -- Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:
+
+    for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database;
+    if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and
+    You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.
+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
+    Unless otherwise separately undertaken by the Licensor, to the extent possible, the Licensor offers the Licensed Material as-is and as-available, and makes no representations or warranties of any kind concerning the Licensed Material, whether express, implied, statutory, or other. This includes, without limitation, warranties of title, merchantability, fitness for a particular purpose, non-infringement, absence of latent or other defects, accuracy, or the presence or absence of errors, whether or not known or discoverable. Where disclaimers of warranties are not allowed in full or in part, this disclaimer may not apply to You.
+    To the extent possible, in no event will the Licensor be liable to You on any legal theory (including, without limitation, negligence) or otherwise for any direct, special, indirect, incidental, consequential, punitive, exemplary, or other losses, costs, expenses, or damages arising out of this Public License or use of the Licensed Material, even if the Licensor has been advised of the possibility of such losses, costs, expenses, or damages. Where a limitation of liability is not allowed in full or in part, this limitation may not apply to You.
+
+    The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.
+
+Section 6 -- Term and Termination.
+
+    This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.
+
+    Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:
+        automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or
+        upon express reinstatement by the Licensor.
+    For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.
+    For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.
+    Sections 1, 5, 6, 7, and 8 survive termination of this Public License.
+
+Section 7 -- Other Terms and Conditions.
+
+    The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.
+    Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.
+
+Section 8 -- Interpretation.
+
+    For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.
+    To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.
+    No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.
+    Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.
diff --git a/tests/data/spec/SOURCES.txt b/tests/data/spec/SOURCES.txt
new file mode 100644
index 0000000..7e9de06
--- /dev/null
+++ b/tests/data/spec/SOURCES.txt
@@ -0,0 +1,31 @@
+Extracts of real SPEC files used to validate the SPEC reader.
+
+The files are generated by tests/validation/make_spec_corpus.py from sources at
+pinned commits; the scans, points kept and SHA-256 of the sources and of the
+files are listed in tests/support/spec_corpus.py.
+
+Sources:
+
+- spec2nexus, https://github.com/prjemian/spec2nexus
+  Commit: 7d315b23463631ae07c98a07d2abc0034e665431
+  Folders: spec2nexus/data, spec2nexus/tests/data
+  License: CC BY 4.0, see LICENSE-spec2nexus.txt
+  Changes: issue216_scan1.spec, user6idd.dat and twoc.dat are unchanged. The
+  other files are extracts: the scans listed in spec_corpus.py, each preceded by
+  the file header that applies to it, the scans of mca_spectra_example.dat and
+  startup_1.spec being limited to their first 3 points.
+  mca_spectra_example_scan1.spec      <- data/mca_spectra_example.dat
+  33id_spec_mesh_escan.spec           <- data/33id_spec.dat
+  20220311-161530_scan2.spec          <- data/20220311-161530.dat
+  05_02_test_none.spec                <- data/05_02_test.dat
+  spec_from_spock_scan1.spec          <- data/spec_from_spock.spc
+  startup_1_scan16.spec               <- data/startup_1.spec
+  CdSe_scan92.spec                    <- data/CdSe
+
+- PyMca, https://github.com/vasole/pymca
+  Commit: 4fbf74ac4edc032b54d9ab05f4ddb75ca19a1aa8
+  File: src/PyMca5/PyMcaData/EXAFS_Cu.dat, unchanged
+  License: MIT, see LICENSE-pymca.txt
+
+references.json holds the values read by spec2nexus (same commit), or by silx
+for the files spec2nexus cannot read, generated by the same script.
diff --git a/tests/data/spec/issue216_scan1.spec b/tests/data/spec/issue216_scan1.spec
new file mode 100644
index 0000000..0224116
--- /dev/null
+++ b/tests/data/spec/issue216_scan1.spec
@@ -0,0 +1,19 @@
+#F spec.scan
+#E 1576690688
+#D Wed Dec 18 12:38:08 2019
+#C fourc User = specuser
+
+#S 1 fastsweep phi 6 10 9 1 /ramdisk/specuser/only9points/ /specuser/chi90/
+#D Wed Dec 18 12:38:08 2019
+#T 1 (Seconds)
+#N 7
+#L EPOCH Phi CESR IC1 IC2 DIODE
+1.0232 6.1048 51127.0000 157861.0000 26694.0000 0.0000 39777.0000
+2.0526 6.2078 51127.0000 158333.0000 33138.0000 0.0000 53174.0000
+3.1015 6.3126 51128.0000 158082.0000 33214.0000 0.0000 53131.0000
+4.1465 6.4171 51127.0000 158155.0000 32896.0000 0.0000 53112.0000
+5.1738 6.5199 51128.0000 158011.0000 33159.0000 0.0000 53051.0000
+6.2206 6.6246 51127.0000 158027.0000 32994.0000 0.0000 53090.0000
+7.2673 6.7292 51127.0000 158042.0000 32962.0000 0.0000 53113.0000
+8.3143 6.8339 51128.0000 157831.0000 33058.0000 0.0000 53005.0000
+9.3671 6.9392 51128.0000 158235.0000 32882.0000 0.0000 53122.0000
diff --git a/tests/data/spec/mca_spectra_example_scan1.spec b/tests/data/spec/mca_spectra_example_scan1.spec
new file mode 100644
index 0000000..f3e9a36
--- /dev/null
+++ b/tests/data/spec/mca_spectra_example_scan1.spec
@@ -0,0 +1,42 @@
+#E 1463332791
+#D Sun May 15 11:19:51 2016
+#C spec  User = specuser
+
+#O0 Hex_X  Hex_Y  Hex_Z  Hex_XP  Hex_YP  Hex_ZP  Energy  XPS_Y
+#O1 XPS_X  XPS_Z  XPS_R  
+#o0 hex_x hex_y hex_z hex_xp hex_yp hex_zp en xps_y
+#o1 xps_x xps_z xps_r 
+
+#J0 Clock  Diode  TEY  I0  SDD1_OCR  SDD1_ICR  SDD2_OCR  SDD2_ICR
+#J1 SDD3_OCR  SDD3_ICR  SDD4_OCR  SDD4_ICR  GratingUp  GratingDown  Timer  
+#j0 tr1_r pd1_r tey_r io_r ocr1 icr1 ocr2 icr2
+#j1 ocr3 icr3 ocr4 icr4 grup grdown timer 
+
+#S 1  cscan en 690 750 60 0
+#D Sun May 15 11:20:24 2016
+#T 60  (Clock)
+#G0 0
+#G1 0
+#G3 0
+#G4 0
+#Q 0 0 0
+#P0 -5.3495 -6.8487 3.3936 8.0000053 -4.8000037 -0.0007 689.9987 5.051
+#P1 9.9875 -71.15 16777.215 
+#N 21
+#L Energy  H  K  L  Epoch  Diode  TEY  I0  SDD1_OCR  SDD1_ICR  SDD2_OCR  SDD2_ICR  SDD3_OCR  SDD3_ICR  SDD4_OCR  SDD4_ICR  GratingUp  GratingDown  Timer  Clock  Clock
+690.02208 0 0 0 34 37 1664 5781 74 994 67 956 56 465 112 1410 0 0 0 50000 50000
+@A1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 35 0 0 35 0 71 0 0 0 0 35 35 0 35 0 107 143 143 143 215 322 358 645 502 681 502 861 1112 1148 1758 1148 1507 1327 1184 1004 466 430 287 179 71 0 35 35 71 71 35 107 71 35 107 71 35 0 0 35 0 0 0 35 35 0 0 0 0 0 71 0 0 0 0 0 0 0 0 35 0 35 0 35 35 0 0 35 0 0 0 0 35 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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diff --git a/tests/data/spec/references.json b/tests/data/spec/references.json
new file mode 100644
index 0000000..1bd7312
--- /dev/null
+++ b/tests/data/spec/references.json
@@ -0,0 +1,1950 @@
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+     "mca": {}
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+  },
+  "EXAFS_Cu.dat": {
+   "reader": "spec2nexus",
+   "scans": [
+    {
+     "key": "1.1",
+     "labels": [
+      "Column 1",
+      "Column 2"
+     ],
+     "columns": [
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+     "mca": {}
+    }
+   ]
+  }
+ }
+}
diff --git a/tests/data/spec/spec_from_spock_scan1.spec b/tests/data/spec/spec_from_spock_scan1.spec
new file mode 100644
index 0000000..69bb705
--- /dev/null
+++ b/tests/data/spec/spec_from_spock_scan1.spec
@@ -0,0 +1,176 @@
+#S 1 ascan phi -5.0 5.0 200 1.0
+#U p09user
+#D 1505468350.0
+#C Acquisition started at Fri Sep 15 11:39:10 2017
+#O0 position  abs  analyzer  ath  atth  bm  chi  chi_eh2
+#O1 chis_eh2  crlpi  crlt  crlx  crlya  crlz  cryox  cryoy
+#O2 cryoz  ctrans  dcm_bragg  dcm_parallel  dcm_perp  del  del_eh2  diax
+#O3 diaz  diff_height  diff_pitch  diffx  diffz_ds  diffz_us  emagvolt  energyfmb
+#O4 exp_dac01  exp_dac02  exp_dac03  exp_dac04  exp_dmy01  exp_dmy02  exp_dmy03  exp_mot47
+#O5 exp_mot48  exp_mot49  exp_mot55  exp_mot56  exp_mot57  exp_mot58  exp_mot59  exp_mot60
+#O6 exp_mot61  exp_mot62  exp_mot63  exp_mot64  ga  ga_eh2  gap  m1pitch
+#O7 m1x  m1y  m1yaw  m2bender  m2pitch  m2x  m2y  m2yaw
+#O8 mchi2  mirchi  mirth  mirz  mj1  mj2  mj3  mnchrmtr
+#O9 mono_mot31  mono_mot32  mtable  mth2  mu  mx  myaw  pchi
+#O10 peta  phi  phis_eh2  pperp  pr1chi  pr1th  pr1tth  pr1xt
+#O11 pr1zs  pr1zt  pr2chi  pr2th  pr2tth  pr2xt  pr2zs  pr2zt
+#O12 pr3chi  pr3th1  pr3th2  pr3yaw  prpitch  pryaw  ps1gap  ps1off
+#O13 ps2gap  ps2left  ps2off  ps2right  pth  ptrans  ptth  ptth_trans
+#O14 qbpm1  qbpm2  s1cx  s1cy  s1dx  s1dy  s2cx  s2cy
+#O15 s2dx  s2dy  s3cx  s3cy  s3dx  s3dy  slit1d  slit1l
+#O16 slit1r  slit1u  slit2d  slit2l  slit2r  slit2u  slit3d  slit3l
+#O17 slit3r  slit3u  table_height  table_pitch  tablex  tablex_eh2  tablez_ds  tablez_us
+#O18 tga_ampl  tga_off  th  ugap  undulator  xs_eh2  ys_eh2  zs_eh2
+#O19 mirrordelay1  mirrordelay2  tgafrequency
+#P0 0.0 0.0 2725.16928406 0.0 0.0 1.281808 60.5575 -3.33066907388e-16
+#P1 2.0 0.213297500298 -9.0 -7.113125 -0.8506 -12.1308375 0.509240924092 -2.06600660066
+#P2 0.1745 124.9276875 44.128845 25.0 15.39477875 45.225775 0.0 -0.51
+#P3 21.809175 21.8091639398 -0.000981675392668 -0.37 21.806 21.807125 0.0 2840.20052155
+#P4 0.0 0.0 0.0 0.0 119.0 0.0 0.0 5.0
+#P5 0.0 3.4329 0.0 0.0 0.0 0.0 0.0 0.0
+#P6 0.0 0.0 0.0 0.0 -1.52587888991e-08 0.0 10.0310001373 3.43179980469
+#P7 2.99969189453 -0.640770202637 0.167273986816 2.49709155273 3.4927121582 0.351399932861 -11.4511640625 0.453078063965
+#P8 0.14522037422 0.27 0.0 -3.51465 0.599962782 0.299953593677 0.299854500581 2840.2002113
+#P9 0.0 0.0 0.599962782 0.0412453222453 0.0 22.5999992371 0.0 16.25
+#P10 0.0 5.0 1.40001931994 2.91 45.0 26.7575 90.0 1.2805
+#P11 1.99999961853 -1.17751980927 -45.0 85.6974 90.0 -0.186 4.0 -7.65
+#P12 -65.0 39.6654003479 39.4095998718 0.8 0.0839 763.97057933 0.0 -0.16
+#P13 -0.06 -0.75 -0.02255 0.15 45.0 87.9999841919 90.5807949174 2.4025
+#P14 5.0 5.0 0.0 -1.11022302463e-16 2.0 2.0 0.0 -0.7562505
+#P15 4.0 5.338333 0.0456036745407 0.244094488189 4.99965879265 4.99960629921 -1.0 1.0
+#P16 -1.0 1.0 -3.425417 2.0 -2.0 1.912916 -2.25570866142 2.54543307087
+#P17 -2.45422572178 2.7438976378 21.8091689927 -0.000882294975657 0.650968691133 198.0474 21.8081455305 21.8092042845
+#P18 1.14655719592e-316 1.14655561491e-316 25.81405 10.0310001373 2840.16967773 -8.762325 -0.5358 11.3666986799
+#P19 2.90000009537 37.5 11.5
+#N 23
+#L Pt_No  phi  exp_t01  exp_c01  exp_vfc01  exp_vfc02  sumvfcs_counts  petra_beamcurrent  abs_position  abs_attenfactor  dettimesattenfactor_counts  lks336_outputchannela  lks336_outputchannelb  lks336_outputchannelc  lks336_outputchanneld  h_position  k_position  l_position  psi_position  del_position  th_position  exp_vfc03  dt
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+14 -4.3 1.0 1.0 26954.5 11218.5 19086.5 100.590713501 0.0 1.0 nan nan nan nan nan 0.359217207933 0.30915048618 2.99184364267 44.3140676547 45.225775 25.81405 0.0 53.8858799934
+15 -4.25 1.0 1.0 26955.0 11232.0 19093.5 100.583084106 0.0 1.0 nan nan nan nan nan 0.358922515874 0.309439341458 2.991938696 44.2642665488 45.225775 25.81405 0.0 55.8152410984
+16 -4.2 1.0 2.0 26981.5 26981.5 19119.0 100.578491211 0.0 1.0 nan nan nan nan nan 0.358627578459 0.309727931449 2.99203374608 44.2144783841 45.225775 25.81405 0.0 57.8007850647
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+21 -3.95 1.0 1.0 26943.5 11209.5 19076.5 100.545227051 0.0 1.0 nan nan nan nan nan 0.357149218895 0.311166894418 2.99250894527 43.9657314074 45.225775 25.81405 0.0 67.4016129971
+22 -3.9 1.0 2.0 26922.5 11209.5 19066.0 100.542106628 0.0 1.0 nan nan nan nan nan 0.356852814061 0.311453888081 2.99260397436 43.916020727 45.225775 25.81405 0.0 69.3303239346
+23 -3.85 1.0 1.0 26933.0 11212.5 19072.75 100.536071777 0.0 1.0 nan nan nan nan nan 0.356556165447 0.311740614922 2.99269899969 43.8663229332 45.225775 25.81405 0.0 71.2596120834
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+27 -3.65 1.0 0.0 26912.0 11199.0 19055.5 100.513717651 0.0 1.0 nan nan nan nan nan 0.355367137703 0.312884849713 2.99307906205 43.6676604657 45.225775 25.81405 0.0 79.1095280647
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+29 -3.55 1.0 0.0 26906.0 11203.5 19054.75 100.502044678 0.0 1.0 nan nan nan nan nan 0.354771167029 0.313455360515 2.99326906883 43.5684063447 45.225775 25.81405 0.0 82.9514548779
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+33 -3.35 1.0 0.0 26916.0 11201.0 19058.5 100.477752686 0.0 1.0 nan nan nan nan nan 0.353576321156 0.314593160242 2.99364903069 43.3700520045 45.225775 25.81405 0.0 90.6490941048
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+64 -1.8 1.0 2.0 26860.0 11186.5 19023.25 100.295669556 0.0 1.0 nan nan nan nan nan 0.344186487761 0.323264013078 2.99659091435 41.8397073619 45.225775 25.81405 0.0 151.85679698
+65 -1.75 1.0 5.0 26848.0 11179.0 5589.5 100.290802002 0.0 1.0 nan nan nan nan nan 0.343879806622 0.323539338794 2.99668571675 41.7905432865 45.225775 25.81405 0.0 153.824084997
+66 -1.7 1.0 2.0 26829.5 11168.0 18998.75 100.286941528 0.0 1.0 nan nan nan nan nan 0.343572891582 0.323814388484 2.9967805123 41.7413917303 45.225775 25.81405 0.0 155.796525002
+67 -1.65 1.0 4.0 26836.0 11177.5 19006.75 100.280685425 0.0 1.0 nan nan nan nan nan 0.343265742874 0.324089161941 2.9968753009 41.6922526841 45.225775 25.81405 0.0 157.771656036
+68 -1.6 1.0 1.0 26850.0 11175.5 19012.75 100.275085449 0.0 1.0 nan nan nan nan nan 0.342958360733 0.324363658954 2.99697008251 41.6431261386 45.225775 25.81405 0.0 159.768462896
+69 -1.55 1.0 4.0 26842.5 11177.0 19009.75 100.268211365 0.0 1.0 nan nan nan nan nan 0.342650745393 0.324637879315 2.99706485703 41.5940120847 45.225775 25.81405 0.0 161.732491016
+70 -1.5 1.0 2.0 26848.0 11174.0 19011.0 100.262466431 0.0 1.0 nan nan nan nan nan 0.342342897087 0.324911822815 2.9971596244 41.5449105131 45.225775 25.81405 0.0 163.743122101
+71 -1.45 1.0 0.0 26839.0 11180.0 19009.5 100.257476807 0.0 1.0 nan nan nan nan nan 0.342034816051 0.325185489245 2.99725438456 41.4958214144 45.225775 25.81405 0.0 165.72824192
+72 -1.4 1.0 1.0 26834.5 11171.0 19002.75 100.251434326 0.0 1.0 nan nan nan nan nan 0.341726502518 0.325458878397 2.99734913741 41.4467447794 45.225775 25.81405 0.0 167.716813087
+73 -1.35 1.0 1.0 26852.0 11187.0 19019.5 100.246086121 0.0 1.0 nan nan nan nan nan 0.341417956724 0.325731990062 2.9974438829 41.3976805988 45.225775 25.81405 0.0 169.672714949
+74 -1.3 1.0 2.0 26840.0 11172.5 19006.25 100.239349365 0.0 1.0 nan nan nan nan nan 0.341109178904 0.326004824033 2.99753862096 41.348628863 45.225775 25.81405 0.0 171.666265965
+75 -1.25 1.0 1.0 26821.5 11170.5 18996.0 100.233261108 0.0 1.0 nan nan nan nan nan 0.340800169292 0.326277380102 2.9976333515 41.2995895627 45.225775 25.81405 0.0 173.622051001
+76 -1.2 1.0 2.0 26835.5 11174.0 19004.75 100.229034424 0.0 1.0 nan nan nan nan nan 0.340490928125 0.326549658061 2.99772807445 41.2505626886 45.225775 25.81405 0.0 175.608258009
+77 -1.15 1.0 5.0 26854.0 11182.5 19018.25 100.221626282 0.0 1.0 nan nan nan nan nan 0.340181455637 0.326821657703 2.99782278976 41.201548231 45.225775 25.81405 0.0 177.579025984
+78 -1.1 1.0 2.0 26871.5 11204.0 19037.75 100.215309143 0.0 1.0 nan nan nan nan nan 0.339871752064 0.327093378821 2.99791749733 41.1525461806 45.225775 25.81405 0.0 179.483396053
+79 -1.05 1.0 2.0 26878.5 11214.5 19046.5 100.206512451 0.0 1.0 nan nan nan nan nan 0.339561817642 0.327364821208 2.99801219711 41.1035565278 45.225775 25.81405 0.0 181.362112999
+80 -1.0 1.0 0.0 26854.5 11183.5 19019.0 100.200317383 0.0 1.0 nan nan nan nan nan 0.339251652608 0.327635984657 2.99810688901 41.0545792631 45.225775 25.81405 0.0 183.359323025
+81 -0.95 1.0 2.0 26827.0 11172.5 18999.75 100.195701599 0.0 1.0 nan nan nan nan nan 0.338941257197 0.327906868961 2.99820157297 41.0056143769 45.225775 25.81405 0.0 185.267961979
+82 -0.9 1.0 3.0 26828.0 11179.0 19003.5 100.189201355 0.0 1.0 nan nan nan nan nan 0.338630631646 0.328177473915 2.99829624892 40.9566618596 45.225775 25.81405 0.0 187.261404991
+83 -0.85 1.0 0.0 26877.5 11210.0 19043.75 100.184158325 0.0 1.0 nan nan nan nan nan 0.338319776191 0.328447799312 2.99839091677 40.9077217016 45.225775 25.81405 0.0 189.157454967
+84 -0.8 1.0 2.0 26872.5 11210.5 19041.5 100.177658081 0.0 1.0 nan nan nan nan nan 0.338008691068 0.328717844947 2.99848557647 40.8587938933 45.225775 25.81405 0.0 191.132190943
+85 -0.75 1.0 1.0 26837.5 11193.0 19015.25 100.17326355 0.0 1.0 nan nan nan nan nan 0.337697376516 0.328987610613 2.99858022793 40.8098784249 45.225775 25.81405 0.0 193.10627389
+86 -0.7 1.0 1.0 26820.0 11169.0 18994.5 100.16796875 0.0 1.0 nan nan nan nan nan 0.337385832771 0.329257096106 2.9986748711 40.7609752868 45.225775 25.81405 0.0 194.996918917
+87 -0.65 1.0 3.0 26818.5 11172.0 18995.25 100.16493988 0.0 1.0 nan nan nan nan nan 0.33707406007 0.32952630122 2.99876950588 40.7120844692 45.225775 25.81405 0.0 196.867285967
+88 -0.6 1.0 0.0 11172.5 11172.5 19003.5 100.157028198 0.0 1.0 nan nan nan nan nan 0.336762058651 0.329795225749 2.99886413221 40.6632059624 45.225775 25.81405 0.0 198.772300005
+89 -0.55 1.0 2.0 26827.0 11169.5 18998.25 100.150283813 0.0 1.0 nan nan nan nan nan 0.336449828751 0.33006386949 2.99895875003 40.6143397566 45.225775 25.81405 0.0 200.760755062
+90 -0.5 1.0 1.0 26824.5 11162.5 18993.5 100.144767761 0.0 1.0 nan nan nan nan nan 0.336137370608 0.330332232238 2.99905335925 40.565485842 45.225775 25.81405 0.0 202.766896963
+91 -0.45 1.0 0.0 26818.5 11173.0 18995.75 100.139389038 0.0 1.0 nan nan nan nan nan 0.335824684461 0.330600313788 2.99914795981 40.5166442088 45.225775 25.81405 11173.0 204.767843008
+92 -0.4 1.0 1.0 26821.0 11171.5 18996.25 100.13230896 0.0 1.0 nan nan nan nan nan 0.335511770546 0.330868113937 2.99924255163 40.4678148471 45.225775 25.81405 0.0 206.761919975
+93 -0.35 1.0 0.0 26826.0 11164.5 18995.25 100.126647949 0.0 1.0 nan nan nan nan nan 0.335198629103 0.331135632479 2.99933713465 40.4189977469 45.225775 25.81405 0.0 208.752655029
+94 -0.3 1.0 3.0 26813.5 11172.5 18993.0 100.121063232 0.0 1.0 nan nan nan nan nan 0.334885260369 0.331402869212 2.99943170878 40.3701928985 45.225775 25.81405 0.0 210.803915024
+95 -0.25 1.0 2.0 26805.0 11167.5 26805.0 100.115661621 0.0 1.0 nan nan nan nan nan 0.334571664584 0.331669823932 2.99952627396 40.3214002918 45.225775 25.81405 0.0 212.757363081
+96 -0.2 1.0 1.0 26799.5 11164.5 18982.0 100.109725952 0.0 1.0 nan nan nan nan nan 0.334257841987 0.331936496436 2.99962083011 40.272619917 45.225775 25.81405 0.0 214.722450018
+97 -0.15 1.0 4.0 26791.0 11168.5 18979.75 100.102539062 0.0 1.0 nan nan nan nan nan 0.333943792816 0.33220288652 2.99971537717 40.2238517639 45.225775 25.81405 0.0 216.670157909
+98 -0.1 1.0 2.0 26795.0 11159.0 18977.0 100.09727478 0.0 1.0 nan nan nan nan nan 0.33362951731 0.332468993983 2.99980991506 40.1750958226 45.225775 25.81405 0.0 218.620893002
+99 -0.05 1.0 1.0 26789.0 11164.0 18976.5 100.090675354 0.0 1.0 nan nan nan nan nan 0.333315015709 0.33273481862 2.99990444371 40.1263520831 45.225775 25.81405 0.0 220.526660919
+100 0.0 1.0 0.0 26801.0 11165.0 18983.0 100.088516235 0.0 1.0 nan nan nan nan nan 0.333000288253 0.33300036023 2.99999896305 40.0776205353 45.225775 25.81405 0.0 222.442755938
+101 0.05 1.0 1.0 26812.5 11175.5 18994.0 100.082466125 0.0 1.0 nan nan nan nan nan 0.332685335181 0.33326561861 3.000093473 40.028901169 45.225775 25.81405 0.0 224.355520964
+102 0.1 1.0 1.0 26789.0 11164.0 18976.5 100.077087402 0.0 1.0 nan nan nan nan nan 0.332370156732 0.333530593559 3.0001879735 39.9801939742 45.225775 25.81405 0.0 226.27019906
+103 0.15 1.0 3.0 26793.5 11152.0 18972.75 100.070709229 0.0 1.0 nan nan nan nan nan 0.332054753148 0.333795284874 3.00028246446 39.9314989408 45.225775 25.81405 0.0 228.172020912
+104 0.2 1.0 3.0 26787.5 11153.5 18970.5 100.065704346 0.0 1.0 nan nan nan nan nan 0.331739124667 0.334059692354 3.00037694583 39.8828160585 45.225775 25.81405 0.0 230.088057995
+105 0.25 1.0 3.0 26785.0 11152.0 18968.5 100.060188293 0.0 1.0 nan nan nan nan nan 0.331423271531 0.334323815799 3.00047141753 39.8341453172 45.225775 25.81405 0.0 232.020833015
+106 0.3 1.0 1.0 26791.5 11149.0 18970.25 100.053703308 0.0 1.0 nan nan nan nan nan 0.33110719398 0.334587655005 3.00056587948 39.7854867066 45.225775 25.81405 0.0 234.04824996
+107 0.35 1.0 1.0 26800.5 11159.5 18980.0 100.046852112 0.0 1.0 nan nan nan nan nan 0.330790892255 0.334851209774 3.00066033161 39.7368402166 45.225775 25.81405 0.0 236.097054005
+108 0.4 1.0 0.0 26793.5 11158.5 18976.0 100.041259766 0.0 1.0 nan nan nan nan nan 0.330474366596 0.335114479903 3.00075477385 39.6882058368 45.225775 25.81405 0.0 238.007595062
+109 0.45 1.0 3.0 26790.0 11154.5 18972.25 100.035263062 0.0 1.0 nan nan nan nan nan 0.330157617245 0.335377465193 3.00084920614 39.6395835569 45.225775 25.81405 0.0 239.936439037
+110 0.5 1.0 1.0 26799.5 11166.0 18982.75 100.0287323 0.0 1.0 nan nan nan nan nan 0.329840644443 0.335640165443 3.00094362839 39.5909733666 45.225775 25.81405 0.0 241.86205101
+111 0.55 1.0 0.0 26802.0 11171.0 18986.5 100.023147583 0.0 1.0 nan nan nan nan nan 0.329523448431 0.335902580453 3.00103804054 39.5423752557 45.225775 25.81405 0.0 243.801583052
+112 0.6 1.0 0.0 26785.0 11171.0 18978.0 100.01763916 0.0 1.0 nan nan nan nan nan 0.329206029451 0.336164710023 3.00113244251 39.4937892136 45.225775 25.81405 0.0 245.783082008
+113 0.65 1.0 1.0 26764.5 11153.0 18958.75 100.011482239 0.0 1.0 nan nan nan nan nan 0.328888387744 0.336426553954 3.00122683424 39.4452152301 45.225775 25.81405 0.0 247.723531008
+114 0.7 1.0 0.0 26792.5 11164.0 18978.25 100.00579834 0.0 1.0 nan nan nan nan nan 0.328570523553 0.336688112046 3.00132121564 39.3966532947 45.225775 25.81405 0.0 249.655016899
+115 0.75 1.0 1.0 26780.0 11149.0 18964.5 100.001785278 0.0 1.0 nan nan nan nan nan 0.328252437119 0.3369493841 3.00141558666 39.3481033969 45.225775 25.81405 0.0 251.618665934
+116 0.8 1.0 1.0 26786.5 11149.5 18968.0 99.9958877563 0.0 1.0 nan nan nan nan nan 0.327934128685 0.337210369918 3.00150994721 39.2995655264 45.225775 25.81405 0.0 253.547859907
+117 0.85 1.0 0.0 26767.5 11152.0 18959.75 99.9906311035 0.0 1.0 nan nan nan nan nan 0.327615598493 0.337471069299 3.00160429722 39.2510396725 45.225775 25.81405 0.0 255.477883101
+118 0.9 1.0 1.0 26780.5 11159.5 18970.0 99.9847717285 0.0 1.0 nan nan nan nan nan 0.327296846786 0.337731482047 3.00169863663 39.2025258248 45.225775 25.81405 0.0 257.360994101
+119 0.95 1.0 2.0 26901.0 11240.0 19070.5 100.207336426 0.0 1.0 nan nan nan nan nan 0.326977873806 0.337991607961 3.00179296536 39.1540239728 45.225775 25.81405 0.0 259.294226885
+120 1.0 1.0 1.0 26994.5 11288.5 19141.5 100.536613464 0.0 1.0 nan nan nan nan nan 0.326658679797 0.338251446846 3.00188728334 39.1055341059 45.225775 25.81405 0.0 261.204668045
+121 1.05 1.0 0.0 27087.0 11335.0 19211.0 100.870048523 0.0 1.0 nan nan nan nan nan 0.326339265001 0.338510998502 3.00198159049 39.0570562135 45.225775 25.81405 0.0 263.110655069
+122 1.1 1.0 2.0 27122.0 11362.0 19242.0 100.960449219 0.0 1.0 nan nan nan nan nan 0.326019629662 0.338770262731 3.00207588675 39.008590285 45.225775 25.81405 0.0 265.04392004
+123 1.15 1.0 2.0 27092.5 11326.0 19209.25 100.954437256 0.0 1.0 nan nan nan nan nan 0.325699774023 0.339029239337 3.00217017205 38.9601363097 45.225775 25.81405 0.0 266.987518072
+124 1.2 1.0 3.0 27039.0 11273.0 5636.5 100.949310303 0.0 1.0 nan nan nan nan nan 0.325379698327 0.339287928123 3.00226444631 38.9116942771 45.225775 25.81405 0.0 268.945748091
+125 1.25 1.0 1.0 27026.0 11247.5 19136.75 100.945800781 0.0 1.0 nan nan nan nan nan 0.325059402819 0.33954632889 3.00235870945 38.8632641763 45.225775 25.81405 0.0 270.883249044
+126 1.3 1.0 1.0 27021.0 11246.0 19133.5 100.940582275 0.0 1.0 nan nan nan nan nan 0.324738887743 0.339804441443 3.00245296142 38.8148459968 45.225775 25.81405 0.0 272.815919876
+127 1.35 1.0 2.0 27028.5 11254.0 19141.25 100.933959961 0.0 1.0 nan nan nan nan nan 0.324418153342 0.340062265584 3.00254720213 38.7664397277 45.225775 25.81405 0.0 274.747592926
+128 1.4 1.0 2.0 27031.5 11254.0 19142.75 100.928070068 0.0 1.0 nan nan nan nan nan 0.32409719986 0.340319801119 3.00264143152 38.7180453584 45.225775 25.81405 0.0 276.682552099
+
diff --git a/tests/data/spec/startup_1_scan16.spec b/tests/data/spec/startup_1_scan16.spec
new file mode 100644
index 0000000..0a40dac
--- /dev/null
+++ b/tests/data/spec/startup_1_scan16.spec
@@ -0,0 +1,531 @@
+#E 1528392280
+#D Thu Jun 07 12:24:40 2018
+#C startup  User = epix33id
+#H0  SR_current  SR_fill  SR_status  SR_mode  SR_fb  SR_fbH  SR_fbV  barometer_mbar
+#H1  ID_gap  ID_E  ID_harmonic  ID_taperGap  ID_taperE
+#H2  FE_RFBPM_HP  FE_RFBPM_VP  FE_RFBPM_HA  FE_RFBPM_VA
+#H3  FE_XBPM_HP  FE_XBPM_VP  FE_XBPM_HA  FE_XBPM_VA
+#H4  White_slit_top  White_slit_bottom  White_slit_left  White_slit_right
+#H5  COUPLE_ID_to_DCM  DCM_energy  DCM_mode  DCM_lambda  DCM_theta0  DCM_thetaEnc  ID_E_Offset
+#H6  Kohzu_theta  Kohzu_y1  Kohzu_z2  Kohzu_chi2  Kohzu_theta2  Kohzu_x2  Kohzu_ybm  Kohzu_x_table  Kohzu_y_table
+#H7  Kohzu_omega2  33IDA_Temp_C  Kohzu_xtal1_T_C  Kohzu_xtal2_T_C
+#H8  Kohzu_cryo_T5  Kohzu_cryo_T6  Kohzu_cryo_flow  Kohzu_cryo_pump_freq  Kohzu_cryo_heatload  Kohzu_cryo_subC_lv  Kohzu_cryo_HVessel_lv  Kohzu_cryo_LN2_P  Kohzu_cryo_HVessel_P
+#H9  FB_o2_on  FB_o2_r  FB_o2_sp  FB_o2_mode
+#H10  Mirr1_angle  Mirr1_y  Mirr1_stripe  Mirr1_bender
+#H11  Mirr2_angle  Mirr2_y  Mirr2_stripe
+#H12  Mono_slit_top  Mono_slit_bottom  Mono_slit_left  Mono_slit_right
+#H13  D3_pos  D3_VDC  D3_gain  D3_bias  D3_time  D3_suppr  D3_dark  D3_Amps
+#H14  HMirr_TY1  HMirr_TY2  HMirr_TY3  HMirr_TX1  HMirr_TX2  HMirr_bender
+#H15  MH_Optable_TY1  MH_Optable_TY2  MH_Optable_TY3  MH_Optable_TX1  MH_Optable_TX2
+#H16  BPM_Guard_slit_top  BPM_Guard_slit_bottom  BPM_Guard_slit_left  BPM_Guard_slit_right
+#H17  XBPM_X_on  XBPM_X_setPoint  XBPM_X  XBPM_Y_on  XBPM_Y_setPoint  XBPM_Y
+#H18  XBPM_gain  XBPM_DiodeA_raw  XBPM_DiodeB_raw  XBPM_DiodeC_raw  XBPM_DiodeD_raw  I01_VDC
+#H19  S02_slit_v_gap  S02_slit_h_gap  S02_slit_v_center  S02_slit_h_center
+#H20  I00_VDC  I00_gain  I00_bias  I00_time  I00_suppr  Post1_Height  Post2_Height
+#H21  S0_slit_v_gap  S0_slit_h_gap  S0_slit_v_center  S0_slit_h_center
+#H22  HSC1t  HSC1l  HSC1b  HSC1r  HSC1h  HSC1v  HSC1h0  HSC1v0
+#H23  HSC2t  HSC2l  HSC2b  HSC2r  HSC2h  HSC2v  HSC2h0  HSC2v0
+#H24  I0_VDC  I0_gain  I0_bias  I0_time  I0_suppr  I0_dark  I0_Amps
+#H25  PIN_VDC  PIN_gain  PIN_bias  PIN_time  PIN_suppr  PIN_dark  PIN_Amps
+#H26  JFK540_i0  JFK540_i1  JFK540_i2  JFK540_i3  JFK540_i4  JFK540_i5  JFK540_i6  JFK540_i7
+#H27  JFK540_i8  JFK540_i9  JFK540_i10  JFK540_i11  JFK540_i12  JFK540_i13  JFK540_i14  JFK540_i15
+#H28  JFK540_o0  JFK540_o1  JFK540_o2  JFK540_o3
+#H29  dark1  dark2  dark3  dark4  dark5  dark6  dark7  dark8
+#H30  dark9  dark10  dark11  dark12  dark13  dark14  dark15  dark16
+#H31  darkToTime  darkCoTime  darkRing
+
+#O0 TwoTheta  theta  chi  phi  kTheta  kappa  kPhi  dummy
+#O1 mu  nu  aTheta  a2Theta  NewportY1  NewportY2  NewportY3  sampleX
+#O2 sampleY  sampleZ  ksamx  ksamy  ksamz  post1V  post2V  slitbpmt
+#O3 slitbpml  slitbpmb  slitbpmr  s02vap  s02vce  s02hap  s02hce  slitJJhap
+#O4 slitJJvce  slitJJvp  slitJJhce  s1hce  s1hap  s1vce  s1vap  s1t
+#O5 s1b  s1l  s1r  s2hap  s2hce  s2vap  s2vce  s2l
+#O6 s2r  s2t  s2b  HbenderU  HbenderD  HposU  HposD  VbenderU
+#O7 VbenderD  VposU  VposD  Htrans  Vtrans  KBVcurv  KBVelip  KBVz
+#O8 KBVth  KBHcurv  KBHelip  KBHz  KBHth  stg1h  stg1v  chV
+#O9 chI  chIV  chSens  
+#o0 tth th chi phi kth kap kphi dummy
+#o1 mu nu ath atth nty1 nty2 nty3 sampx
+#o2 sampy sampz ksamx ksamy ksamz post1V post2V s00t
+#o3 s00l s00b s00r s02vap s02vce s02hap s02hce s0hap
+#o4 s0vce s0vap s0hce s1hce s1hap s1vce s1vap s1t
+#o5 s1b s1l s1r s2hap s2hce s2vap s2vce s2l
+#o6 s2r s2t s2b hbu hbd hpu hpd vbu
+#o7 vbd vpu vpd htrans vtrans kbvcu kbvel kbvz
+#o8 kbvth kbhcu kbhel kbhz kbhth stg1h stg1v chV
+#o9 chI chIV chSens 
+
+#J0 seconds  I0  detector  harmonics  I00  d3  I01  scan_bar
+#J1 Temp_cs  Temp_sa  Temp_sp  Temp_pw  Vor_TotT  Vor_ICR  Vor_OCR  Vor_CalLiveT
+#J2 Vor_RealT  Vor_Trigger  Vor_Event  Vor_Overf  Vor_Underf  Vor_TrigLiveT  Vor_SCA1  Vor_SCA2
+#J3 Vor_SCA3  Vor_SCA4  filters  trans  corrdet  Energy  Ekohzu  Kcurr
+#J4 Kvolt  Kenab  imtot  immax  imroi1  imroi2  imroi3  imroi4
+#J5 imsca1  imsca2  imsca3  imsca4  ccd_tot  ccd_sig  CHI_I  CHI_V
+#J6 chVout  chIout  chIVout  chGain  
+#j0 sec I0 det harm I00 d3 I01 scanbar
+#j1 Temp_cs Temp_sa Temp_sp Temp_pw vortot voricr vorocr vorcalt
+#j2 vorrt vortrig vorevnt vorovrf vorundf vortrlt vorsca1 vorsca2
+#j3 vorsca3 vorsca4 filters trans corrdet Energy Ekohzu Kcurr
+#j4 Kvolt Kenab imtot immax imroi1 imroi2 imroi3 imroi4
+#j5 imsca1 imsca2 imsca3 imsca4 ccd_tot ccd_sig CHI_I CHI_V
+#j6 chVout chIout chIVout chGain 
+
+
+#S 16  ascan  tth 15 25  100 0.05
+#D Thu Jun 07 16:27:20 2018
+#T 0.05  (seconds)
+#G0 0 0 0 0 0 1 0 0 0 0 0 0 50 0 0.1 0 68 68 50 -1 1 1 3.13542 3.13542 0 463.6 838.8 1
+#G1 1.54 1.54 1.54 90 90 90 4.079990459 4.079990459 4.079990459 90 90 90 1 0 0 0 1 0 60 30 0 0 0 0 60 30 0 -90 0 0 1.54 1.54 0 0
+#G3 4.079990459 -6.561125068e-16 -6.561125068e-16 0 -4.079990459 2.498273628e-16 0 0 -4.079990459
+#G4 -0.005495453679 -0.03452142767 -0.6475598007 0.6199214482 -10.5899 -4.4101 0 0 0 0 0 0 0 0 0 0 -180 -180 -180 -180 -180 -180 -180 -180 -180 0
+#Q -0.00549545 -0.0345214 -0.64756
+#P0 15 10.5899 90 9.045 -46.4553 134.7559 -48.0002 0
+#P1 0 0 -135.9866 0.5375 18.3857 18.0753 27.69 0.2999992
+#P2 0 6 -2 -1 2.98 20.0001 30.149785 1.8
+#P3 2 1.7 2.5 0.59998913 0.0999998 0.7999855 0.1199896 1.0001875
+#P4 0 1.0000938 0 0.1 14 0.8 4.6 3.1
+#P5 1.5 6.9 7.1 0 0 0 0 0
+#P6 0 0 0 2.7999951 2.8000018 2.1979145 -0.0823727 0.0014393
+#P7 0.050002 1.3635021 -0.2732489 5.38e-05 -1.4999716 2.8 0 1.16005
+#P8 2.9360465 0.0257 0.0486 0.5451 3.1600405 -41.71 11.09 -9.7e-05
+#P9 57.072491 61.956329 6 
+#UXML <group name="attenuator_set" NX_class="NXcollection" prefix="33idd:filter:" description="33-ID-D Filters" unique_id="33idd:filter:">
+#UXML   <dataset name="attenuator_count" type="int">16</dataset>
+#UXML   <dataset name="energy_input">Mono</dataset>
+#UXML   <dataset name="energy_value" type="float" units="keV">19.99999</dataset>
+#UXML   <dataset name="wait_time" type="float" units="s">0.800</dataset>
+#UXML   <dataset name="transmission" type="float">1.00000000e+00</dataset>
+#UXML   <dataset name="binary_mask" type="int">0</dataset>
+#UXML   <dataset name="transmission_counter">trans</dataset>
+#UXML   <dataset name="mask_counter">filters</dataset>
+#UXML   <dataset name="corrdet_counter">corrdet</dataset>
+#UXML   <hardlink name="attenuator1" target_id="33idd:filter:Fi1:"/>
+#UXML   <hardlink name="attenuator2" target_id="33idd:filter:Fi2:"/>
+#UXML   <hardlink name="attenuator3" target_id="33idd:filter:Fi3:"/>
+#UXML   <hardlink name="attenuator4" target_id="33idd:filter:Fi4:"/>
+#UXML   <hardlink name="attenuator5" target_id="33idd:filter:Fi5:"/>
+#UXML   <hardlink name="attenuator6" target_id="33idd:filter:Fi6:"/>
+#UXML   <hardlink name="attenuator7" target_id="33idd:filter:Fi7:"/>
+#UXML   <hardlink name="attenuator8" target_id="33idd:filter:Fi8:"/>
+#UXML   <hardlink name="attenuator9" target_id="33idd:filter:Fi9:"/>
+#UXML   <hardlink name="attenuator10" target_id="33idd:filter:Fi10:"/>
+#UXML   <hardlink name="attenuator11" target_id="33idd:filter:Fi11:"/>
+#UXML   <hardlink name="attenuator12" target_id="33idd:filter:Fi12:"/>
+#UXML   <hardlink name="attenuator13" target_id="33idd:filter:Fi13:"/>
+#UXML   <hardlink name="attenuator14" target_id="33idd:filter:Fi14:"/>
+#UXML   <hardlink name="attenuator15" target_id="33idd:filter:Fi15:"/>
+#UXML   <hardlink name="attenuator16" target_id="33idd:filter:Fi16:"/>
+#UXML </group>
+#UXML <group name="attenuator1" NX_class="NXattenuator" number="1" pv_prefix="33idd:filter:Fi1:" unique_id="33idd:filter:Fi1:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">251.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">1.69102353e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator2" NX_class="NXattenuator" number="2" pv_prefix="33idd:filter:Fi2:" unique_id="33idd:filter:Fi2:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">512.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">2.66408632e-02</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator3" NX_class="NXattenuator" number="3" pv_prefix="33idd:filter:Fi3:" unique_id="33idd:filter:Fi3:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">1019.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">7.35312738e-04</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator4" NX_class="NXattenuator" number="4" pv_prefix="33idd:filter:Fi4:" unique_id="33idd:filter:Fi4:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">1946.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">1.03717841e-06</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator5" NX_class="NXattenuator" number="5" pv_prefix="33idd:filter:Fi5:" unique_id="33idd:filter:Fi5:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">155.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">8.69451052e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator6" NX_class="NXattenuator" number="6" pv_prefix="33idd:filter:Fi6:" unique_id="33idd:filter:Fi6:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">328.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">7.43763516e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator7" NX_class="NXattenuator" number="7" pv_prefix="33idd:filter:Fi7:" unique_id="33idd:filter:Fi7:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">666.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">5.48213938e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator8" NX_class="NXattenuator" number="8" pv_prefix="33idd:filter:Fi8:" unique_id="33idd:filter:Fi8:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">1340.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">2.98376360e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator9" NX_class="NXattenuator" number="9" pv_prefix="33idd:filter:Fi9:" unique_id="33idd:filter:Fi9:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Free</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">251.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">1.69102353e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator10" NX_class="NXattenuator" number="10" pv_prefix="33idd:filter:Fi10:" unique_id="33idd:filter:Fi10:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Free</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">501.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">2.87988007e-02</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator11" NX_class="NXattenuator" number="11" pv_prefix="33idd:filter:Fi11:" unique_id="33idd:filter:Fi11:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Free</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">997.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">8.59259438e-04</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator12" NX_class="NXattenuator" number="12" pv_prefix="33idd:filter:Fi12:" unique_id="33idd:filter:Fi12:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Free</dataset>
+#UXML   <dataset name="type">Ti</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">1945.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">1.04454841e-06</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator13" NX_class="NXattenuator" number="13" pv_prefix="33idd:filter:Fi13:" unique_id="33idd:filter:Fi13:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">156.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">8.68666694e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator14" NX_class="NXattenuator" number="14" pv_prefix="33idd:filter:Fi14:" unique_id="33idd:filter:Fi14:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">332.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">7.41083260e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator15" NX_class="NXattenuator" number="15" pv_prefix="33idd:filter:Fi15:" unique_id="33idd:filter:Fi15:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Lock</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">661.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">5.50693446e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="attenuator16" NX_class="NXattenuator" number="16" pv_prefix="33idd:filter:Fi16:" unique_id="33idd:filter:Fi16:">
+#UXML   <dataset name="enable">Enable</dataset>
+#UXML   <dataset name="lock">Free</dataset>
+#UXML   <dataset name="type">Al</dataset>
+#UXML   <dataset name="thickness" type="float" units="micron">1351.000</dataset>
+#UXML   <dataset name="attenuator_transmission" type="float">2.95428763e-01</dataset>
+#UXML   <dataset name="status">Out</dataset>
+#UXML </group>
+#UXML <group name="ad_regions_of_interest" NX_class="NXcollection" prefix="dp_pilatus3:">
+#UXML   <group name="roi1" NX_class="NXcollection" number="1" description="" roi_prefix="dp_pilatus3:ROI1:" array_port="ROI1" input_port="PIL">
+#UXML     <dataset name="min_x" type="int">258</dataset>
+#UXML     <dataset name="size_x" type="int">10</dataset>
+#UXML     <dataset name="min_y" type="int">84</dataset>
+#UXML     <dataset name="size_y" type="int">10</dataset>
+#UXML     <dataset name="size_bg" type="int">0</dataset>
+#UXML   </group>
+#UXML   <group name="roi2" NX_class="NXcollection" number="2" description="" roi_prefix="dp_pilatus3:ROI2:" array_port="ROI2" input_port="PIL">
+#UXML     <dataset name="min_x" type="int">248</dataset>
+#UXML     <dataset name="size_x" type="int">30</dataset>
+#UXML     <dataset name="min_y" type="int">71</dataset>
+#UXML     <dataset name="size_y" type="int">36</dataset>
+#UXML     <dataset name="size_bg" type="int">0</dataset>
+#UXML   </group>
+#UXML   <group name="roi3" NX_class="NXcollection" number="3" description="" roi_prefix="dp_pilatus3:ROI3:" array_port="ROI3" input_port="PIL">
+#UXML     <dataset name="min_x" type="int">233</dataset>
+#UXML     <dataset name="size_x" type="int">60</dataset>
+#UXML     <dataset name="min_y" type="int">59</dataset>
+#UXML     <dataset name="size_y" type="int">60</dataset>
+#UXML     <dataset name="size_bg" type="int">0</dataset>
+#UXML   </group>
+#UXML   <group name="roi4" NX_class="NXcollection" number="4" description="" roi_prefix="dp_pilatus3:ROI4:" array_port="ROI4" input_port="PIL">
+#UXML     <dataset name="min_x" type="int">213</dataset>
+#UXML     <dataset name="size_x" type="int">100</dataset>
+#UXML     <dataset name="min_y" type="int">39</dataset>
+#UXML     <dataset name="size_y" type="int">100</dataset>
+#UXML     <dataset name="size_bg" type="int">0</dataset>
+#UXML   </group>
+#UXML </group>
+#UXML <group name="ad_counters" NX_class="NXcollection" prefix="dp_pilatus3:">
+#UXML   <dataset name="ad_counter1" number="1" stats_prefix="dp_pilatus3:Stats5:" array_port="STATS5" input_port="PIL" value_description="Total">imtot</dataset>
+#UXML   <dataset name="ad_counter2" number="2" stats_prefix="dp_pilatus3:Stats5:" array_port="STATS5" input_port="PIL" value_description="MaxValue">immax</dataset>
+#UXML   <dataset name="ad_counter3" number="3" stats_prefix="dp_pilatus3:Stats1:" array_port="STATS1" input_port="ROI1" value_description="Net">imroi1</dataset>
+#UXML   <dataset name="ad_counter4" number="4" stats_prefix="dp_pilatus3:Stats2:" array_port="STATS2" input_port="ROI2" value_description="Net">imroi2</dataset>
+#UXML   <dataset name="ad_counter5" number="5" stats_prefix="dp_pilatus3:Stats3:" array_port="STATS3" input_port="ROI3" value_description="Net">imroi3</dataset>
+#UXML   <dataset name="ad_counter6" number="6" stats_prefix="dp_pilatus3:Stats4:" array_port="STATS4" input_port="ROI4" value_description="Net">imroi4</dataset>
+#UXML   <dataset name="ad_counter7" number="7" stats_prefix="dp_pilatus3:Stats1:" array_port="STATS1" input_port="ROI1" value_description="MaxValue">imsca1</dataset>
+#UXML   <dataset name="ad_counter8" number="8" stats_prefix="dp_pilatus3:Stats2:" array_port="STATS2" input_port="ROI2" value_description="MaxValue">imsca2</dataset>
+#UXML   <dataset name="ad_counter9" number="9" stats_prefix="dp_pilatus3:Stats3:" array_port="STATS3" input_port="ROI3" value_description="MaxValue">imsca3</dataset>
+#UXML   <dataset name="ad_counter10" number="10" stats_prefix="dp_pilatus3:Stats4:" array_port="STATS4" input_port="ROI4" value_description="MaxValue">imsca4</dataset>
+#UXML </group>
+#@SCA0	vorsca1	-1	0
+#@SCA1	vorsca2	-2	0
+#@SCA2	vorsca3	-3	0
+#@SCA3	vortrlt	-109	0
+#@SCA4	vorcalt	-101	0
+#@SCA5	vorrt	-102	0
+#@SCA6	voricr	-103	0
+#@SCA7	vorocr	-104	0
+#@SCA8	vortrig	-105	0
+#@SCA9	vorevnt	-106	0
+#@SCA10	vorovrf	-107	0
+#@SCA11	vorundf	-108	0
+#C startup
+#V0  101.825  4  1  4  1  1  1  987.386
+#V1  16.6857  20.2533  3  0  0
+#V2  -0.0920786  -0.0548024  -19.3442  87.5248
+#V3  -1.8189  -10.0626  73.3319  527.549
+#V4  1.00006  0  0.8  1
+#V5  1  20  0  0.619921  5.67308  5.68471  0.15
+#V6  5.67308  -10.0492  101.161  -0.269605  0.449905  -9.53674e-07  10  26  0
+#V7  1.43337  21.5035  -145.418  -170.359
+#V8  76.65  78.75  4.25947  30.0289  243.111  37.303  42.9599  2.27105  1.9987
+#V9  0  -0.00504319  0  maximum
+#V10  3.00006  21.4  3  -8.49998
+#V11  2.90001  29.8024  3
+#V12  5.99989  -1  2.48256  1.99993
+#V13  1  -1.49695  1.0e+10  0.005  9  2e-12  0  -1.49695e-10
+#V14  29.8  29.8  29.8  0.6275  -1.62675  85000
+#V15  29.8  29.8  29.8  26.7056  29.421
+#V16  1.8  1.7  2  2.5
+#V17  0  -0.2  0.0402608  0  0  0.370851
+#V18  2  134206  130016  118223  126794  1.29381
+#V19  0.6  0.8  0.0999998  0.12
+#V20  0.6215  1.0e+06  0  8  4.54e-09  20.0001  30.1498
+#V21  1  1  0  0
+#V22  3.1  6.9  1.5  7.1  14  4.6  0.1  0.8
+#V23  0  0  0  0  0  0  0  0
+#V24  0.00732601  10000000  7  0.015  -1e-11  0  7.32601e-10
+#V25  -0.041514  0  20256  0  0  0  0
+#V26  0.046398  -0.021978  0.612943  0.00732601  0.00732601  -0.041514  0.002442  -0.03663
+#V27  -0.03663  -0.01221  0.00732601  -0.002442  -0.021978  -0.046398  -0.0561661  0.0561661
+#V28  0  4.8  10  0
+#V29  0  0  0  0  0  0  0  0
+#V30  0  0  0  0  0  0  0  0
+#V31  0  0  100
+#N 41
+#L TwoTheta  H  K  L  Alpha  Beta  Epoch  seconds  I00  d3  I01  Vor_TotT  Vor_ICR  Vor_OCR  Vor_CalLiveT  Vor_RealT  Vor_Trigger  Vor_Event  Vor_Overf  Vor_Underf  Vor_TrigLiveT  Vor_SCA1  Vor_SCA2  Vor_SCA3  filters  trans  corrdet  Energy  imtot  immax  imroi2  imroi3  imroi4  imsca1  imsca2  imsca3  imsca4  CHI_I  CHI_V  I0  imroi1
+15.0391 -0.00547416 -0.0343876 -0.64925 -10.5895 -4.4496 14570.589 0.37224042 23757 56744 48409 10.300978 14948.046 13378.734 4.5070772 5.050104 74592 67372 192 0 4.9900835 490 11597 1595 0 1 36.232907 19.999986 94453561 2027.1739 1106073.9 3692409.8 10404508 1107.6087 1128.2609 1145.6522 1246.7391 4.8863966 4.8647288 2833 102647.83
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diff --git a/tests/data/spec/twoc.dat b/tests/data/spec/twoc.dat
new file mode 100644
index 0000000..5e499cd
--- /dev/null
+++ b/tests/data/spec/twoc.dat
@@ -0,0 +1,142 @@
+#F VA2343
+#E 1632386243
+#D Thu Sep 23 10:37:23 2021
+#C twoc  User = user
+
+#O0 TwoTheta  Theta  Sample  Detector  Magnet  ix  igrec  zet
+#O1 EngEPCS  KEPCO  RxMirror  EngPM3  
+#o0 tth th thR tthR mag x y z
+#o1 ens curr rx eng 
+#J0 Kth14  Kth15  Kth16  Kth17  ringc  TempSample  TempControl  TempSet
+#J1 HeaterSet  psd  psdI  EngEpcs  Kth140flp  Kth150flp  Kth160flp  Kth170flp
+#J2 Time  EngEth  
+#j0 Detectr TEY Izero Monitor ringc tsample tcryo tset
+#j1 htrset psd psdI enPM3 detneg teyneg i0neg mntneg
+#j2 sec enETH 
+
+
+#S 1  ascan  y -25.09 -13.09  20 2
+#D Thu Sep 23 10:47:02 2021
+#T 2  (Time)
+#G0 0
+#G1 6.283185307 6.283185307 90 1 1 90 1 0 60 30 0
+#G3 1 6.123233996e-17 0 1
+#G4 0.002630754808 0.004233892841 0 1.54
+#Q 0.00263075 0.00423389
+#P0 0.07 58.18 58.11 0.069999886 1.5258789e-06 -8.855 -19.09 -264.21
+#P1 639.98 0.0032499999 -2939 639.9795 
+#N 19
+#L igrec  H  K  Epoch  Kth15  Kth16  Kth17  ringc  TempSample  TempControl  TempSet  HeaterSet  psd  psdI  EngEpcs  Time  EngEth  Kth14  Kth14
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+#S 2  loopscan 100 2 0
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+#C Thu Sep 23 10:50:28 2021.  Scan aborted after 33 points.
diff --git a/tests/data/spec/user6idd.dat b/tests/data/spec/user6idd.dat
new file mode 100644
index 0000000..21d19ca
--- /dev/null
+++ b/tests/data/spec/user6idd.dat
@@ -0,0 +1,119 @@
+#F ~/data/user6idd.dat
+#E 1383072022
+#D Tue Oct 29 13:40:22 2013
+#C psic6IDD User = user6idd
+#O0 Delta Eta Chi Phi Nu Mu tt_y tt_z
+#O1 m1_om m1_chi m1_phi m2_om m2_chi m2_phi m1_filter mot43
+#O2 m1_bend m2_bend m1_x m1_y m2_z xs zs ys
+#O3 tta oma chia phia xm ym xd yd
+#O4 sl1_t sl1_b sl1_o sl1_i sl2_t sl2_b sl2_o sl2_i
+#O5 sl4_t sl4_b sl4_o sl4_i sl5_t sl5_b sl5_o sl5_i
+#O6 sl3_t sl3_b sl3_o sl3_i sl3_r dummy aux_y aux_x_base
+#O7 aux_th aux_x x_detector
+
+#S 1 rotscan testing dummy 0 0 100 0.1 5
+#D Tue Oct 29 14:05:53 2013
+#T 0.1 (Seconds)
+#G0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0
+#G1 1.54 1.54 1.54 90 90 90 4.079990459 4.079990459 4.079990459 90 90 90 1 0 0 0 1 0 60 30 0 0 0 0 60 30 0 -90 0 0 1.54 1.54
+#G3 4.079990459 -6.865325574e-16 -6.561207576e-16 -3.041179982e-17 -4.079990459 2.49819112e-16 0 0 -4.079990459
+#G4 0 0 0 0.1235653136 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -180 -180 -180 -180 -180 -180 -180 -180 -180 0 0 0 0 0 0 0 0 0 0 0 0
+#Q 0 0 0
+#P0 0 0 90 -3 0 0 700 700
+#P1 2.162381 -0.12024 -0.909126 2.162131 -0.80976 -0.799578 86.365625 0
+#P2 -5.99 -5.99 1 4.6500032 2.8633327e-05 0 0 0
+#P3 0 0 0 0 0 -3.5 0 0
+#P4 0.25 -0.25 0.25 -0.25 0.35 -0.35 0.35 -0.35
+#P5 2 -2 2 -2 2.84 -1.16 0.845 -3.155
+#P6 0 -5 0 0 0 0 0 -21.95
+#P7 0 21.74875 0
+#UE 100.339 0.123565 179.998 42.1688 (Energy in keV, Lambda in Angstroem, Undulator Gap + Energy)
+#X 0 -273.15 (Temperature Setpoint in K and C)
+#UX 0 0 1 100.339 (All Banks: Filter, Thickness in mm, Transmission, calculated for energy)
+#UX1 0 0 1 0 (Bank 1:Filter, Thickness in mm, Transmission, calculated for energy)
+#UX2 0 0 1 0 (Bank 2:Filter, Thickness in mm, Transmission, calculated for energy)
+#UB 4.07999 -6.86533e-16 -6.56121e-16 -3.04118e-17 -4.07999 2.49819e-16 0 0 -4.07999
+#N 25
+#L dummy Time DelTime Index Dropped H K L DegK_reg DegK_sample Epoch Seconds RingCurrent moa mob coa cob MCA_Detector MCA_Total AD_ROI1_Total AD_ROI1_Max scu0_cur MCA_Compton Monitor Detector
+#C Tue Oct 29 14:05:53 2013. Scan aborted after 0 points.
+
+#S 2 rotscan testing dummy 0 0 100 0.1 5
+#D Tue Oct 29 14:06:25 2013
+#T 0.1 (Seconds)
+#G0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0
+#G1 1.54 1.54 1.54 90 90 90 4.079990459 4.079990459 4.079990459 90 90 90 1 0 0 0 1 0 60 30 0 0 0 0 60 30 0 -90 0 0 1.54 1.54
+#G3 4.079990459 -6.865325574e-16 -6.561207576e-16 -3.041179982e-17 -4.079990459 2.49819112e-16 0 0 -4.079990459
+#G4 0 0 0 0.1235653136 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -180 -180 -180 -180 -180 -180 -180 -180 -180 0 0 0 0 0 0 0 0 0 0 0 0
+#Q 0 0 0
+#P0 0 0 90 -3 0 0 700 700
+#P1 2.162381 -0.12024 -0.909126 2.162131 -0.80976 -0.799578 86.365625 0
+#P2 -5.99 -5.99 1 4.6500032 2.8633327e-05 0 0 0
+#P3 0 0 0 0 0 -3.5 0 0
+#P4 0.25 -0.25 0.25 -0.25 0.35 -0.35 0.35 -0.35
+#P5 2 -2 2 -2 2.84 -1.16 0.845 -3.155
+#P6 0 -5 0 0 0 0 0 -21.95
+#P7 0 21.74875 0
+#UE 100.339 0.123565 179.998 42.1688 (Energy in keV, Lambda in Angstroem, Undulator Gap + Energy)
+#X 0 -273.15 (Temperature Setpoint in K and C)
+#UX 0 0 1 100.339 (All Banks: Filter, Thickness in mm, Transmission, calculated for energy)
+#UX1 0 0 1 0 (Bank 1:Filter, Thickness in mm, Transmission, calculated for energy)
+#UX2 0 0 1 0 (Bank 2:Filter, Thickness in mm, Transmission, calculated for energy)
+#UB 4.07999 -6.86533e-16 -6.56121e-16 -3.04118e-17 -4.07999 2.49819e-16 0 0 -4.07999
+#N 25
+#L dummy Time DelTime Index Dropped H K L DegK_reg DegK_sample Epoch Seconds RingCurrent moa mob coa cob MCA_Detector MCA_Total AD_ROI1_Total AD_ROI1_Max scu0_cur MCA_Compton Monitor Detector
+0 1383073585.374759 -0.000759 2 0 0 0 0 0 0 1563 0.1 0.0102 1 1 1 1 141 11699 0 0 0 3848 1 0
+0 1383073585.578769 -0.000769 4 0 0 0 0 0 0 1563 0.1 0.0102 1 1 1 1 141 11699 0 0 0 3848 1 0
+0 1383073585.703298 -0.000298 5 0 0 0 0 0 0 1563 0.1 0.0102 1 1 1 1 141 11699 0 0 0 3848 1 0
+0 1383073585.889650 -0.000650 7 0 0 0 0 0 0 1563 0.1 0.0102 1 1 1 1 141 11699 0 0 0.12207404 3848 1 0
+0 1383073586.028877 0.000123 8 0 0 0 0 0 0 1564 0.1 0.0102 1 1 1 1 141 11699 0 0 0.12207404 3848 1 0
+0 1383073586.242838 -0.000838 10 0 0 0 0 0 0 1564 0.1 0.0102 1 1 1 1 141 11699 0 0 0.12207404 3848 1 0
+0 1383073586.401895 0.000105 12 0 0 0 0 0 0 1564 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073586.617823 0.000177 14 0 0 0 0 0 0 1564 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073586.773157 -0.000157 15 0 0 0 0 0 0 1564 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073586.987346 -0.000346 18 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073587.111611 -0.000611 19 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073587.235586 -0.000586 20 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.12207404 3848 1 0
+0 1383073587.396767 0.000233 22 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 0.15259255 3848 1 0
+0 1383073587.558454 -0.000454 23 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 0.15259255 3848 1 0
+0 1383073587.773534 -0.000534 26 0 0 0 0 0 0 1565 0.1 0.0102 1 1 1 1 141 11699 0 0 0.15259255 3848 1 0
+0 1383073587.949097 -0.000097 27 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 0.15259255 3848 1 0
+0 1383073588.158376 -0.000376 29 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 0.15259255 3848 1 0
+0 1383073588.327235 -0.000235 31 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073588.532477 -0.000477 33 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073588.679982 0.000018 35 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073588.888847 0.000153 37 0 0 0 0 0 0 1566 0.1 0.0102 1 1 1 1 141 11699 0 0 0.030518509 3848 1 0
+0 1383073589.070463 -0.000463 38 0 0 0 0 0 0 1567 0.1 0.0102 1 1 1 1 141 11699 0 0 0.030518509 3848 1 0
+0 1383073589.282489 -0.000489 41 0 0 0 0 0 0 1567 0.1 0.0102 1 1 1 1 141 11699 0 0 0.030518509 3848 1 0
+0 1383073589.439304 -0.000304 42 0 0 0 0 0 0 1567 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.18311106 3848 1 0
+0 1383073589.657698 -0.000698 44 0 0 0 0 0 0 1567 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.18311106 3848 1 0
+0 1383073589.822744 -0.000744 46 0 0 0 0 0 0 1567 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073590.036854 0.000146 48 0 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073590.195998 0.000002 50 2 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073590.403124 -0.000124 52 4 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.45777764 3848 1 0
+0 1383073590.561602 -0.000602 53 4 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.45777764 3848 1 0
+0 1383073590.774385 -0.000385 55 7 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.45777764 3848 1 0
+0 1383073590.937098 -0.000098 57 8 0 0 0 0 0 1568 0.1 0.0102 1 1 1 1 141 11699 0 0 0.030518509 3848 1 0
+0 1383073591.382668 -0.000668 62 12 0 0 0 0 0 1569 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.21362957 3848 1 0
+0 1383073591.546547 -0.000547 63 13 0 0 0 0 0 1569 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.21362957 3848 1 0
+0 1383073591.761622 -0.000622 65 15 0 0 0 0 0 1569 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.21362957 3848 1 0
+0 1383073591.923105 -0.000105 67 16 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073592.134837 0.000163 69 18 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073592.306965 0.000035 71 21 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.061037019 3848 1 0
+0 1383073592.504328 -0.000328 73 23 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 0.061037019 3848 1 0
+0 1383073592.666886 0.000114 74 23 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 0.061037019 3848 1 0
+0 1383073592.875718 0.000282 76 25 0 0 0 0 0 1570 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.15259255 3848 1 0
+0 1383073593.034075 -0.000075 78 26 0 0 0 0 0 1571 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.15259255 3848 1 0
+0 1383073593.245451 -0.000451 80 29 0 0 0 0 0 1571 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.15259255 3848 1 0
+0 1383073593.418504 -0.000504 82 32 0 0 0 0 0 1571 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.30518509 3848 1 0
+0 1383073593.634928 0.000072 84 34 0 0 0 0 0 1571 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.30518509 3848 1 0
+0 1383073593.795867 0.000133 86 36 0 0 0 0 0 1571 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.30518509 3848 1 0
+0 1383073594.005156 -0.000156 88 38 0 0 0 0 0 1572 0.1 0.0102 1 1 1 1 141 11699 0 0 0.061037019 3848 1 0
+0 1383073594.160503 -0.000503 89 38 0 0 0 0 0 1572 0.1 0.0102 1 1 1 1 141 11699 0 0 0.061037019 3848 1 0
+0 1383073594.375008 -0.000008 91 41 0 0 0 0 0 1572 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073594.528036 -0.000036 93 42 0 0 0 0 0 1572 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073594.737089 -0.000089 95 45 0 0 0 0 0 1572 0.1 0.0102 1 1 1 1 141 11699 0 0 -0.091555528 3848 1 0
+0 1383073594.908258 -0.000258 97 48 0 0 0 0 0 1573 0.1 0.0102 1 1 1 1 141 11699 0 0 0.18311106 3848 1 0
+0 1383073595.126488 -0.000488 99 50 0 0 0 0 0 1573 0.1 0.0102 1 1 1 1 141 11699 0 0 0.18311106 3848 1 0
+0 1383073595.267593 -0.000593 100 51 0 0 0 0 0 1573 0.1 0.0102 1 1 1 1 141 11699 0 0 0.18311106 3848 1 0
+0 1383073595.478344 -0.000344 102 52 0 0 0 0 0 1573 0.1 0.0102 1 1 1 1 141 11699 0 0 0 3848 1 0
+#R 2 
diff --git a/tests/data/xdi/.gitattributes b/tests/data/xdi/.gitattributes
new file mode 100644
index 0000000..6254495
--- /dev/null
+++ b/tests/data/xdi/.gitattributes
@@ -0,0 +1 @@
+* -text
diff --git a/tests/data/xdi/BadFiles.txt b/tests/data/xdi/BadFiles.txt
new file mode 100644
index 0000000..e17122a
--- /dev/null
+++ b/tests/data/xdi/BadFiles.txt
@@ -0,0 +1,50 @@
+invalid xdi files.  None should segfault.
+All should either pass or give a useful error message.
+
+file         status        OK?      description of error in file
+--------     --------      ---    --------------------
+bad_00.xdi   file read      Y     valid xdi file, used to modify for rest of files
+bad_01.xdi   error msg      Y     No XDI line at top
+bad_02.xdi   file read(1)   Y     No element.edge
+bad_03.xdi   file read(1)   Y     No element.symbol
+bad_04.xdi   file read(1)   Y     Invalid element.edge
+bad_05.xdi   file read(1)   Y     Invalid element.symbol
+bad_06.xdi   file read(1)   Y     No '------'
+bad_07.xdi   file read(2)   Y     No Column labels  -
+bad_08.xdi   file read(2)   Y     Too few Column labels
+bad_09.xdi   file read(2)   Y     Too many Column labels
+bad_10.xdi   file read(2)   Y     Column indices not continuous
+bad_11.xdi   file read(3)   Y     Unsupported comment character
+bad_12.xdi   file read(1)   Y     angle given without mono.d_spacing
+bad_13.xdi   error msg      Y     inconsistent number of columns in data table -- too few
+bad_14.xdi   error msg      Y     inconsistent number of columns in data table -- too many
+bad_15.xdi   error msg      Y     NaN in data table
+bad_16.xdi   error msg      Y     string in data table
+bad_17.xdi   error msg      Y     bad number ('1.2.3') in data table
+bad_18.xdi   error msg      Y     Header 'Family.Key: Value' -- no value
+bad_19.xdi   error msg      Y     Header 'Family.Key: Value' -- no ':'
+bad_20.xdi   error msg      Y     Header 'Family.Key: Value' -- two ':'
+bad_21.xdi   error msg      Y     Header 'Family.Key: Value' -- no '.'
+bad_22.xdi   error msg      Y     Header 'Family.Key: Value' -- two '.'
+bad_23.xdi   file read(4)   Y     Header 'Family.Key: Value' -- key starts with number
+bad_24.xdi   error msg      Y     Header 'Family.Key: Value' -- Family starts with number
+bad_25.xdi   file read(5)   Y     No extra version given
+bad_26.xdi   file read(6)   Y     No user comment
+bad_27.xdi   file read(6)   Y     Line of '////', but no user comment
+bad_28.xdi   file read(1)   Y     incorrectly format date-time
+bad_29.xdi   file read(1)   Y     date-time has invalid range (month > 12)
+bad_30.xdi   file read(1)   Y     Invalid element.edge and element.symbol, test accumulation in XDI_required_metadata
+bad_31.xdi   file read(1)   Y     Invalid value for d-spacing, trigger error in XDI_required_metadata
+bad_32.xdi   file read(7)   Y     Missing recommended fields
+bad_33.xdi   file read(1)   Y     Invalid Sample.temperature
+bad_34.xdi   file read(1)   Y     Invalid Facility.energy
+bad_35.xdi   file read(1)   Y     Invalid Facility.current
+
+Notes:
+  1. files read, return value > 0, indicating Warning  
+  2. extra column labels ignored, unspecified column labels set to 'colN' (N=1...)
+  3. lines with unrecognized comment characters ignored
+  4. keys are allowed to start with a number...
+  5. extra version is left as empty string ''
+  6. user comment is left as empty string ''
+  7. files read, XDI_recommended_metadata returns non-0
diff --git a/tests/data/xdi/SHA256SUMS b/tests/data/xdi/SHA256SUMS
new file mode 100644
index 0000000..b300977
--- /dev/null
+++ b/tests/data/xdi/SHA256SUMS
@@ -0,0 +1,40 @@
+c219665f68e51f6f1bd4faf07c06a904b70372bea7aeed1140ef0133509dfbb3  bad_00.xdi
+f2dd1e727231152c9a50096ecd109a6e3ef6962fdc0651668b5c872fd9837499  bad_01.xdi
+e66de4271650a2935712d027092d860dbb2f95d058308a0749ef15bc5383624d  bad_02.xdi
+2d9bd019abe878f82ac855af68f8c6933a45f4f9ab736e02f359c10b3892cdf3  bad_03.xdi
+10193b0f6ca83e18e4d5769576754025326440b9c5d056324a88a8a0378893de  bad_04.xdi
+fe186f32255e9f1e873a56a2e1f35504b44e1a35a15f69c9d2ef5ab062df511b  bad_05.xdi
+e33725cf527e3d4ce700ee4d4b030263cf4d05bd464bded6de1bc3cb096f5f02  bad_06.xdi
+a8a915fe77bed972dce653dfab1773b14846ba5ada005d4ada13f0bd9431f621  bad_07.xdi
+f7e58034646e7023901bb2ed5935419be5226476de68122a46049653e8e18dbf  bad_08.xdi
+8f69e026e58b673d06e5dea2c9f97f523f07b829adea4cc07ab19933de719432  bad_09.xdi
+6ae336bcb9918c96dc92fb473e64f24c392848fdf5855db41557f3e85bef46f4  bad_10.xdi
+0b7149e38377f503168190afd34807d961fc16c6316ec42cf5d6d8ea8ea8fe39  bad_11.xdi
+2d489ab2f8fefbc44098975ac0c9791d0a9123379387571e74ecea55932d6306  bad_12.xdi
+c03717c3d4810f03612fe19bc688346bf56d2f0da2cd9df66eb6e88735d11b0e  bad_13.xdi
+7af4a32e9c93f11b29e4607caad7456ddfa7aae9a9d6a5bc1b1b8192b7491746  bad_14.xdi
+e6f1ab358553c018cc0fabf99818f29423631abbc3ceff1ad096a131deb28939  bad_15.xdi
+d0278c61da990696eeef2f0ae80b9922867a69dc2c864f4bf00d6f68cf892a3b  bad_16.xdi
+0b47f6ba1da4ab17a03bd9c9765aebbe3f419d06609b1f36babc2c6c431dfc5d  bad_17.xdi
+152bf9d55557195397cce358e03f9f735f5f5a482b8c56f434d342748cebc9d5  bad_18.xdi
+e06ef77bb8c059da05ce4964082fb0521d9373233613e9c71481b083fe1368fd  bad_19.xdi
+69f962cb08315f5942cf3034f476923d59b37d1c9224d8f66a479442eaf53e45  bad_20.xdi
+5c59496e584b594bbe8eea5329288ebedc13c5d7a1a8b15dc284cbe5b3a61aca  bad_21.xdi
+1085e6805fa6e07e69c937cd161a0e7fa5784063a0d50ec83aff8d8bb002bf48  bad_22.xdi
+cb952bb5f08844550ddd45eddb5c2551eb0e2d904b6a1fdb4fc955e3b339792a  bad_23.xdi
+e6fc92746bfd79646325e21f260f9135449ef8db1b5358a833708a953e333177  bad_24.xdi
+2c4d5587ab4c99114193a4c054a3b4959d99cf2c76c1a8d4feb990dcccef8531  bad_25.xdi
+b23dfd47dda7ce1b4e4801c1196ace6e2c337bab31931001ef200bf498919a5c  bad_26.xdi
+dcd9dd5aaf612c7d5f0c0ba112446f36eff83c87e565e94286f0ef8b1f3b62bf  bad_27.xdi
+68d35c9522db5b5de42a1fa89e728d3818bfe7346bc8a8af00f5fbd5df38ff60  bad_28.xdi
+88381a0cdd5b4952eac18dece8a2e8c9fabcf6952ac0e362280415d44ca6358f  bad_29.xdi
+6e0b6860d7f34891b27b94e4d73d771892b95d4cb429fc2602d7fce59d1767b3  bad_30.xdi
+57f4eb8dd4ef023ac806aa1ffb926d2b085d69cdcd4a1a1bbf277fa2d5b45e83  bad_31.xdi
+3063439f62be889cdbb17b794cc258bf5e6ed962b2992a99f59964bea6c03bff  bad_32.xdi
+78eb3d87c6dd81306c0807af7562752903092d220714a8a9fdd611764e46f65e  bad_33.xdi
+adce5f839a4a69cdf63d60393cad89dba62d9b67a43f5330d5be2e61b37f9895  bad_34.xdi
+757a13ea4019e485f978cddb4374655c420b0566f93deb294af4382adad2f891  bad_35.xdi
+8de651c27e25023ff01a430a73ec9121c5aebea4756b378d5395886796870a52  BadFiles.txt
+e8250723d9637caf8cf8446d661b601f16b95cfe53a821bb98f2e8fb7eeb46e3  nonxafs_1d.xdi
+363faca3011b01d19258f1b33d11ba3e930417240ec73daf03dc5d384c97f81b  nonxafs_2d.xdi
+644bf0d6fa7621eab8e1ab93152c2b38e25e2a2566c5f2a7ad177e6f5e817c3d  nonxafs_negvalues.xdi
diff --git a/tests/data/xdi/SOURCES.txt b/tests/data/xdi/SOURCES.txt
new file mode 100644
index 0000000..325e44f
--- /dev/null
+++ b/tests/data/xdi/SOURCES.txt
@@ -0,0 +1,10 @@
+Test files of the XDI library, used to validate the XDI reader.
+
+Source: XAS-Data-Interchange, https://github.com/XraySpectroscopy/XAS-Data-Interchange
+Commit: ed21ad5aa3a066f569e13e607679b2542fc93fa7
+Folders: data (nonxafs_*.xdi), baddata (bad_*.xdi, BadFiles.txt)
+License: public domain (Unlicense), as stated in the README of the repository
+
+The files are unchanged. Their SHA-256 are listed in SHA256SUMS and checked by
+the tests (tests/validation/test_xdi_corpus.py). BadFiles.txt describes the
+error of each invalid file and how the XDI library reads it.
diff --git a/tests/data/xdi/bad_00.xdi b/tests/data/xdi/bad_00.xdi
new file mode 100644
index 0000000..165ab6e
--- /dev/null
+++ b/tests/data/xdi/bad_00.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_01.xdi b/tests/data/xdi/bad_01.xdi
new file mode 100644
index 0000000..b80bc73
--- /dev/null
+++ b/tests/data/xdi/bad_01.xdi
@@ -0,0 +1,40 @@
+#
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_02.xdi b/tests/data/xdi/bad_02.xdi
new file mode 100644
index 0000000..400379a
--- /dev/null
+++ b/tests/data/xdi/bad_02.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+#
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_03.xdi b/tests/data/xdi/bad_03.xdi
new file mode 100644
index 0000000..e745084
--- /dev/null
+++ b/tests/data/xdi/bad_03.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+#
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_04.xdi b/tests/data/xdi/bad_04.xdi
new file mode 100644
index 0000000..25d32f5
--- /dev/null
+++ b/tests/data/xdi/bad_04.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: Foo
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_05.xdi b/tests/data/xdi/bad_05.xdi
new file mode 100644
index 0000000..902f147
--- /dev/null
+++ b/tests/data/xdi/bad_05.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Foo
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_06.xdi b/tests/data/xdi/bad_06.xdi
new file mode 100644
index 0000000..5f02083
--- /dev/null
+++ b/tests/data/xdi/bad_06.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_07.xdi b/tests/data/xdi/bad_07.xdi
new file mode 100644
index 0000000..92212e3
--- /dev/null
+++ b/tests/data/xdi/bad_07.xdi
@@ -0,0 +1,36 @@
+# XDI/1.0 GSE/1.0
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_08.xdi b/tests/data/xdi/bad_08.xdi
new file mode 100644
index 0000000..83a2ac8
--- /dev/null
+++ b/tests/data/xdi/bad_08.xdi
@@ -0,0 +1,39 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_09.xdi b/tests/data/xdi/bad_09.xdi
new file mode 100644
index 0000000..2b8c698
--- /dev/null
+++ b/tests/data/xdi/bad_09.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Column.5: misc_fluor
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_10.xdi b/tests/data/xdi/bad_10.xdi
new file mode 100644
index 0000000..f3ff644
--- /dev/null
+++ b/tests/data/xdi/bad_10.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.7: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_11.xdi b/tests/data/xdi/bad_11.xdi
new file mode 100644
index 0000000..8998c5d
--- /dev/null
+++ b/tests/data/xdi/bad_11.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+! Beamline.collimation: none
+! Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_12.xdi b/tests/data/xdi/bad_12.xdi
new file mode 100644
index 0000000..220d61c
--- /dev/null
+++ b/tests/data/xdi/bad_12.xdi
@@ -0,0 +1,36 @@
+# XDI/1.0 GSE/1.0
+# Column.1: angle degrees
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.invalid_d_spacing_name: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# angle i0 itrans mutrans
+  12.300  149013.7  550643.089065  -1.3070486
+  12.200  144864.7  531876.119084  -1.3006104
+  12.100  132978.7  489591.10592  -1.3033816
+  12.000  125444.7  463051.104096  -1.3059724
+  11.900  121324.7  449969.103983  -1.3107085
+  11.800  119447.7  444386.117562  -1.3138152
+  11.700  119100.7  440176.091039  -1.3072055
+  11.600  117707.7  440448.106567  -1.3195882
diff --git a/tests/data/xdi/bad_13.xdi b/tests/data/xdi/bad_13.xdi
new file mode 100644
index 0000000..59e7af5
--- /dev/null
+++ b/tests/data/xdi/bad_13.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+#
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039 -1.3033816
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_14.xdi b/tests/data/xdi/bad_14.xdi
new file mode 100644
index 0000000..8ae8e16
--- /dev/null
+++ b/tests/data/xdi/bad_14.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+#
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882   2.3  3.3
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_15.xdi b/tests/data/xdi/bad_15.xdi
new file mode 100644
index 0000000..dc65404
--- /dev/null
+++ b/tests/data/xdi/bad_15.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  nan       550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_16.xdi b/tests/data/xdi/bad_16.xdi
new file mode 100644
index 0000000..f5884be
--- /dev/null
+++ b/tests/data/xdi/bad_16.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0    STRING  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_17.xdi b/tests/data/xdi/bad_17.xdi
new file mode 100644
index 0000000..0233382
--- /dev/null
+++ b/tests/data/xdi/bad_17.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  1.4.9     550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_18.xdi b/tests/data/xdi/bad_18.xdi
new file mode 100644
index 0000000..e05dc0a
--- /dev/null
+++ b/tests/data/xdi/bad_18.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family.key:
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_19.xdi b/tests/data/xdi/bad_19.xdi
new file mode 100644
index 0000000..3017564
--- /dev/null
+++ b/tests/data/xdi/bad_19.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family.key  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_20.xdi b/tests/data/xdi/bad_20.xdi
new file mode 100644
index 0000000..8a8384c
--- /dev/null
+++ b/tests/data/xdi/bad_20.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family:key:  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_21.xdi b/tests/data/xdi/bad_21.xdi
new file mode 100644
index 0000000..15f8f85
--- /dev/null
+++ b/tests/data/xdi/bad_21.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family key:  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_22.xdi b/tests/data/xdi/bad_22.xdi
new file mode 100644
index 0000000..c9dd2fe
--- /dev/null
+++ b/tests/data/xdi/bad_22.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family.key.subkey:  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_23.xdi b/tests/data/xdi/bad_23.xdi
new file mode 100644
index 0000000..bb7c1f0
--- /dev/null
+++ b/tests/data/xdi/bad_23.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Family.00key:  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_24.xdi b/tests/data/xdi/bad_24.xdi
new file mode 100644
index 0000000..5cacaa0
--- /dev/null
+++ b/tests/data/xdi/bad_24.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# 2000Family.key:  Value
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_25.xdi b/tests/data/xdi/bad_25.xdi
new file mode 100644
index 0000000..22197c2
--- /dev/null
+++ b/tests/data/xdi/bad_25.xdi
@@ -0,0 +1,42 @@
+# XDI/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# GSE.EXTRA2:  config 2
+# GSE.EXTRA3:  config 3
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_26.xdi b/tests/data/xdi/bad_26.xdi
new file mode 100644
index 0000000..1697df1
--- /dev/null
+++ b/tests/data/xdi/bad_26.xdi
@@ -0,0 +1,37 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+#-----------
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_27.xdi b/tests/data/xdi/bad_27.xdi
new file mode 100644
index 0000000..5dd3ea4
--- /dev/null
+++ b/tests/data/xdi/bad_27.xdi
@@ -0,0 +1,38 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-02 22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+#//////
+#-------
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_28.xdi b/tests/data/xdi/bad_28.xdi
new file mode 100644
index 0000000..4998f9b
--- /dev/null
+++ b/tests/data/xdi/bad_28.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-Jun-26 22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_29.xdi b/tests/data/xdi/bad_29.xdi
new file mode 100644
index 0000000..1b3fbe4
--- /dev/null
+++ b/tests/data/xdi/bad_29.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-26-6T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_30.xdi b/tests/data/xdi/bad_30.xdi
new file mode 100644
index 0000000..6681bc7
--- /dev/null
+++ b/tests/data/xdi/bad_30.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: Bar
+# Element.symbol: Foo
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_31.xdi b/tests/data/xdi/bad_31.xdi
new file mode 100644
index 0000000..75a1956
--- /dev/null
+++ b/tests/data/xdi/bad_31.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: three point one three five five three
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_32.xdi b/tests/data/xdi/bad_32.xdi
new file mode 100644
index 0000000..34573e6
--- /dev/null
+++ b/tests/data/xdi/bad_32.xdi
@@ -0,0 +1,38 @@
+# XDI/1.0 GSE/1.0
+# Column.1: Energie eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_33.xdi b/tests/data/xdi/bad_33.xdi
new file mode 100644
index 0000000..a1e8896
--- /dev/null
+++ b/tests/data/xdi/bad_33.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# Sample.temperature: 300.0a K
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_34.xdi b/tests/data/xdi/bad_34.xdi
new file mode 100644
index 0000000..b27ef80
--- /dev/null
+++ b/tests/data/xdi/bad_34.xdi
@@ -0,0 +1,40 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 missing units
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/bad_35.xdi b/tests/data/xdi/bad_35.xdi
new file mode 100644
index 0000000..02cb32b
--- /dev/null
+++ b/tests/data/xdi/bad_35.xdi
@@ -0,0 +1,41 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Element.edge: K
+# Element.symbol: Cu
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.current: 101x ma
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
diff --git a/tests/data/xdi/nonxafs_1d.xdi b/tests/data/xdi/nonxafs_1d.xdi
new file mode 100644
index 0000000..b2b657e
--- /dev/null
+++ b/tests/data/xdi/nonxafs_1d.xdi
@@ -0,0 +1,434 @@
+# XDI/1.0 GSE/1.0
+# Column.1: x mm
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
+  8899.0  117058.7  444213.107169  -1.3336289
+  8909.0  117276.7  443655.118274  -1.3305114
+  8919.0  117332.7  447444.089027  -1.3385381
+  8929.0  117332.7  448243.08656  -1.3403222
+  8939.0  117756.7  450590.088482  -1.3419374
+  8949.0  117199.7  445515.089564  -1.3353518
+  8959.0  117458.7  448318.080875  -1.3394162
+  8959.5  118720.7  452987.112399  -1.33909
+  8960.0  119008.7  453897.09061  -1.3386739
+  8960.5  120520.7  459458.086604  -1.3382262
+  8961.0  121659.7  463407.085905  -1.3373781
+  8961.5  121341.7  461871.092985  -1.3366753
+  8962.0  121394.7  462122.090047  -1.3367819
+  8962.5  121094.7  460800.080519  -1.3363914
+  8963.0  120769.7  459282.103674  -1.3357792
+  8963.5  121015.7  460053.086954  -1.3354216
+  8964.0  120395.7  457426.089176  -1.3348315
+  8964.5  120179.7  456370.108905  -1.334316
+  8965.0  120917.7  458901.113976  -1.3337246
+  8965.5  121353.7  460121.102908  -1.3327803
+  8966.0  120788.7  457767.099353  -1.3323178
+  8966.5  120845.7  457111.080183  -1.3304119
+  8967.0  120809.7  456945.11275  -1.3303467
+  8967.5  120816.7  456721.100387  -1.3297984
+  8968.0  121040.7  456712.117546  -1.3279264
+  8968.5  120821.7  455636.118464  -1.3273786
+  8969.0  120986.7  455646.104782  -1.3260358
+  8969.5  121289.7  456040.079324  -1.3243988
+  8970.0  121113.7  454700.096839  -1.3229083
+  8970.5  120800.7  452979.096663  -1.3217039
+  8971.0  120024.7  449150.111057  -1.3196596
+  8971.5  120379.7  449521.109059  -1.3175319
+  8972.0  120769.7  449996.104574  -1.3153535
+  8972.5  120602.7  448130.091064  -1.3125819
+  8973.0  120328.7  445849.104818  -1.3097534
+  8973.5  120405.7  444572.112191  -1.3062454
+  8974.0  120519.7  443087.082423  -1.3019531
+  8974.5  120702.7  442108.088971  -1.2982239
+  8975.0  120678.7  439452.108017  -1.2923971
+  8975.5  120861.7  437344.107549  -1.2860734
+  8976.0  120656.7  433022.081423  -1.2778394
+  8976.5  120856.7  429645.111677  -1.268354
+  8977.0  120421.7  422855.092398  -1.2560298
+  8977.5  120825.7  417044.116521  -1.238843
+  8978.0  120630.7  407292.09755  -1.2167968
+  8978.5  120845.7  393860.082322  -1.1814812
+  8979.0  120832.7  373749.1103  -1.1291778
+  8979.5  121033.7  341663.084759  -1.0377561
+  8980.0  120305.7  285470.099526  -0.86410129
+  8980.5  121037.7  224434.100994  -0.61748006
+  8981.0  120519.7  169329.099398  -0.34003093
+  8981.5  122539.7  144339.099533  -0.16373033
+  8982.0  121788.7  130447.100044  -0.068680205
+  8982.5  121415.7  125296.099961  -0.031459541
+  8983.0  121266.7  125935.100051  -0.037774443
+  8983.5  121720.7  130781.099967  -0.071795857
+  8984.0  120930.7  134301.100019  -0.10486664
+  8984.5  120764.7  136416.100084  -0.12186575
+  8985.0  120680.7  134201.100471  -0.10619121
+  8985.5  121074.7  128945.100013  -0.062979022
+  8986.0  121052.7  120751.100006  0.0024945857
+  8986.5  120823.7  114286.099966  0.055627505
+  8987.0  120819.7  108683.100371  0.10586304
+  8987.5  120508.7  103269.099677  0.15438375
+  8988.0  120647.7  97879.100478  0.20914168
+  8988.5  120841.7  92466.1003467  0.26763933
+  8989.0  121405.7  86074.0997052  0.34392928
+  8989.5  121141.7  78746.1001681  0.43073218
+  8990.0  121046.7  70957.1001759  0.53410095
+  8990.5  121244.7  63712.100005  0.64343632
+  8991.0  120832.7  56482.1000247  0.76048317
+  8991.5  120815.7  49455.0998374  0.89320106
+  8992.0  121341.7  44121.1002893  1.0116724
+  8992.5  121202.7  39260.1005751  1.1272556
+  8993.0  120950.7  34973.1010491  1.2408038
+  8993.5  121165.7  31819.0997413  1.3370923
+  8994.0  120954.7  29573.1009162  1.4085509
+  8994.5  121145.7  28221.1007995  1.456924
+  8995.0  121337.7  27885.0992008  1.4704851
+  8995.5  120813.7  28091.0997043  1.4587969
+  8996.0  121141.7  29094.1008822  1.4264255
+  8996.5  121052.7  30362.0990245  1.3830309
+  8997.0  120941.7  31979.1014993  1.330226
+  8997.5  121002.7  33461.0996421  1.2854293
+  8998.0  121188.7  34974.1016582  1.242741
+  8998.5  121138.7  36310.101112  1.2048402
+  8999.0  120996.7  37194.1009651  1.1796131
+  8999.5  120960.7  37723.0985117  1.1651931
+  9000.0  121314.7  37878.0995107  1.1640149
+  9000.5  121168.7  37286.0994935  1.1785632
+  9001.0  121360.7  36173.0983472  1.2104514
+  9001.5  120946.7  34370.0983609  1.258163
+  9002.0  120951.7  32474.1014225  1.3149484
+  9002.5  120887.7  30601.0987591  1.3738261
+  9003.0  120998.7  28755.0988188  1.4369647
+  9003.5  121373.7  27509.0988149  1.4843574
+  9004.0  120709.7  26687.0996485  1.5092082
+  9004.984  121041.7  27368.1003491  1.486757
+  9005.988  120887.7  29580.0993354  1.4077602
+  9007.012  120692.7  32480.0984292  1.3126201
+  9008.053  120984.7  34952.1013495  1.2416855
+  9009.114  120672.7  36846.1015968  1.1863321
+  9010.193  120735.7  39018.1007018  1.1295782
+  9011.293  120772.7  41039.099827  1.079385
+  9012.41  120715.7  41985.1000325  1.0561234
+  9013.548  120854.7  41895.1009468  1.0594201
+  9014.703  120629.7  41188.1017689  1.0745761
+  9015.878  121092.7  40374.0991  1.0983679
+  9017.072  120875.7  38874.1010013  1.1344345
+  9018.285  120788.7  36969.1003508  1.1839603
+  9019.518  120999.7  34899.1008845  1.243327
+  9020.769  120541.7  32760.1012997  1.3027844
+  9022.038  120685.7  31044.0991092  1.3577809
+  9023.327  120883.7  29564.1011517  1.4082681
+  9024.636  120691.7  28068.0988785  1.4586057
+  9025.963  120725.7  27100.1003287  1.4939836
+  9027.309  120616.7  26972.0986672  1.4978148
+  9028.674  120830.7  27971.098825  1.4632186
+  9030.059  120639.7  29626.099643  1.4041527
+  9031.461  120397.7  31588.0988095  1.33802
+  9032.884  120036.7  33733.0992644  1.269318
+  9034.325  121377.7  35921.100176  1.2175823
+  9035.785  120948.7  36969.0985274  1.1852841
+  9037.265  121082.7  37616.1012403  1.1690416
+  9038.763  120756.7  37556.0985899  1.167942
+  9040.28  121289.7  37212.1008075  1.1815479
+  9041.816  120826.7  36312.0988564  1.2022063
+  9043.372  120724.7  35797.098648  1.2156459
+  9044.946  120299.7  35704.1000386  1.2147206
+  9046.54  120652.7  36149.1006714  1.2052641
+  9048.152  120559.7  36016.1001881  1.208179
+  9049.783  120452.7  35302.0997351  1.2273147
+  9051.434  120443.7  34485.0992117  1.2506551
+  9053.104  120628.7  34146.0984743  1.2620689
+  9054.792  120364.7  34082.0993435  1.261754
+  9056.5  120251.7  33925.0997525  1.2654319
+  9058.227  120521.7  33383.1011952  1.28378
+  9059.972  120447.7  32363.1015837  1.3141967
+  9061.736  120426.7  31464.098607  1.3421941
+  9063.521  120317.7  30803.1003099  1.3625204
+  9065.322  120372.7  30307.0986204  1.3792108
+  9067.145  120543.7  29727.0986654  1.3999533
+  9068.985  119794.7  28765.0999294  1.4266166
+  9070.845  120186.7  27985.101158  1.4573741
+  9072.724  120213.7  27425.1010929  1.4778123
+  9074.621  120487.7  27545.100322  1.475723
+  9076.538  120588.7  28291.1004009  1.4498383
+  9078.474  120579.7  29645.0998423  1.4030141
+  9080.429  120842.7  31326.099498  1.3500381
+  9082.402  120501.7  32743.1002572  1.3029716
+  9084.396  120409.7  34085.0984921  1.2620398
+  9086.407  120267.7  35323.0982567  1.225183
+  9088.438  120150.7  36140.1013024  1.2013437
+  9090.488  120250.7  36597.1010203  1.1896097
+  9092.557  120386.7  37604.0990468  1.163596
+  9094.646  120571.7  39229.0991523  1.1228258
+  9096.752  120531.7  40824.0998194  1.0826402
+  9098.878  120450.7  41893.1002104  1.0561194
+  9101.023  120209.7  41889.0986509  1.0542121
+  9103.188  120404.7  41105.0986543  1.0747264
+  9105.37  120119.7  39534.0982204  1.1113252
+  9107.572  120080.7  37898.1014344  1.153263
+  9109.794  120161.7  36531.0993837  1.1906744
+  9112.034  119914.7  35391.0993129  1.2203203
+  9114.293  120580.7  35045.101223  1.2356834
+  9116.571  120440.7  34930.0997882  1.2378086
+  9118.868  120496.7  35055.0985049  1.2347013
+  9121.185  120120.7  34796.0985758  1.2389918
+  9123.52  120422.7  34006.1011229  1.2644681
+  9125.874  120278.7  32222.0999167  1.317159
+  9128.247  119965.7  29872.101021  1.3902809
+  9130.64  120456.7  28476.1003784  1.4422252
+  9133.051  120415.7  27888.1013526  1.4627498
+  9135.481  120588.7  28156.0987146  1.4546216
+  9137.931  120311.7  28653.1010131  1.4348242
+  9140.399  120317.7  29501.0998095  1.4057082
+  9142.887  120547.7  30753.1007087  1.3660547
+  9145.393  120249.7  32463.0985228  1.3094664
+  9147.919  120056.7  34512.1015187  1.2466541
+  9150.463  120366.7  37183.0984967  1.1746886
+  9153.026  120206.7  39929.0991856  1.1021074
+  9155.609  120165.7  42802.0981525  1.0322845
+  9158.211  120626.7  45214.0998973  0.98129167
+  9160.831  120451.7  46148.1001245  0.95939305
+  9163.471  120273.7  45254.0997822  0.97747671
+  9166.129  120243.7  43181.1007445  1.0241176
+  9168.807  120444.7  40699.101923  1.0849847
+  9171.504  118476.7  37884.1006733  1.1401848
+  9174.22  120845.7  37318.098566  1.1750361
+  9176.954  121414.7  36823.0997413  1.1930866
+  9179.708  121351.7  36775.0983604  1.193872
+  9182.48  121213.7  37082.1011181  1.1844207
+  9185.272  120590.7  37293.101639  1.1735938
+  9188.083  120312.7  37325.0986648  1.1704282
+  9190.913  120539.7  37571.1008046  1.165744
+  9193.762  119831.7  37718.0989823  1.1559482
+  9196.63  120077.7  38292.100944  1.1428954
+  9199.517  119941.7  38309.1009776  1.1413183
+  9202.422  120308.7  37629.0982064  1.1622833
+  9205.348  120172.7  36100.1014232  1.2026342
+  9208.291  120270.7  34788.0986525  1.2404697
+  9211.254  119981.7  34205.0991584  1.2549645
+  9214.236  120286.7  34422.0986219  1.2511793
+  9217.237  120315.7  34809.0991187  1.2402403
+  9220.257  120255.7  35426.0990257  1.2221715
+  9223.296  120627.7  36669.1001566  1.1907745
+  9226.354  120288.7  38259.1017698  1.1455132
+  9229.432  120376.7  39999.1015476  1.101769
+  9232.527  120443.7  41725.0982326  1.0600796
+  9235.643  119993.7  43011.1008382  1.025981
+  9238.776  120132.7  43976.0982677  1.0049507
+  9241.93  119879.7  44116.1002096  0.99966394
+  9245.103  119841.7  43872.1009877  1.0048931
+  9248.293  120142.7  43733.0978347  1.010575
+  9251.504  120114.7  43643.1011089  1.0124019
+  9254.732  120026.7  43544.1000164  1.01394
+  9257.981  120260.7  43532.0995353  1.0161633
+  9261.248  120240.7  43308.0992477  1.0211559
+  9264.535  120126.7  42948.1003929  1.0285546
+  9267.84  120427.7  42632.0992416  1.0384421
+  9271.164  120157.7  42158.1004167  1.0473782
+  9274.508  120399.7  41921.0983672  1.0550278
+  9277.87  120169.7  41539.0982598  1.0622698
+  9281.252  120187.7  41438.1016548  1.0648539
+  9284.652  120351.7  41379.0986408  1.0676424
+  9288.071  120011.7  41165.101154  1.0699984
+  9291.51  120091.7  41074.0985656  1.0728779
+  9294.968  120182.7  41105.0993242  1.0728809
+  9298.444  120056.7  41011.0987458  1.0741214
+  9301.939  120384.7  41416.0981059  1.0670228
+  9305.454  119816.7  41831.0997047  1.052323
+  9308.988  120268.7  42710.099147  1.035293
+  9312.541  120022.7  43585.1018624  1.0129655
+  9316.112  120292.7  44416.1001416  0.99632592
+  9319.703  120180.7  45080.0998214  0.98055554
+  9323.313  120233.7  45570.0999619  0.97018555
+  9326.941  119937.7  45658.1001361  0.96579141
+  9330.589  120382.7  45958.1001385  0.96294572
+  9334.256  120584.7  46387.0998718  0.95533101
+  9337.941  120442.7  46969.1001162  0.94168418
+  9341.646  119941.7  47571.0998763  0.92478036
+  9345.37  119272.7  47838.100235  0.91359007
+  9349.113  120658.7  48430.0998852  0.91284438
+  9352.875  119987.7  48096.1002301  0.91418814
+  9356.655  120594.7  48296.1002095  0.91508452
+  9360.456  120662.7  48315.099927  0.91525491
+  9364.274  120544.7  48194.1000759  0.91678403
+  9368.112  120200.7  47916.1000412  0.91971128
+  9371.97  119833.7  47737.1002355  0.92039607
+  9375.846  120177.7  47771.0998386  0.92255063
+  9379.74  119774.7  47635.1001723  0.92204259
+  9383.654  120445.7  47782.0998369  0.92454794
+  9387.588  119193.7  47342.0998975  0.92334994
+  9391.54  120422.7  47864.0999029  0.92264231
+  9395.511  120139.7  47793.1002255  0.92177395
+  9399.501  120456.7  48076.1000061  0.91850518
+  9403.51  120156.7  48199.0997866  0.91345638
+  9407.538  120125.7  48678.0998823  0.90330946
+  9411.585  119994.7  49126.1001643  0.89305711
+  9415.651  119267.7  49483.0999648  0.87973935
+  9419.736  120771.7  50685.1002397  0.86827
+  9423.841  120413.7  51009.0997754  0.85892927
+  9427.964  120472.7  51266.0998062  0.85439346
+  9432.106  120225.7  51359.10019  0.85052867
+  9436.268  120331.7  51607.0998062  0.84659284
+  9440.448  119882.7  51645.1001531  0.84211844
+  9444.647  120383.7  52122.0999255  0.8370951
+  9448.866  120247.7  52460.1000699  0.8295009
+  9453.104  119875.7  52796.0999079  0.82001805
+  9457.359  120335.7  53391.1000882  0.81264127
+  9461.635  120309.7  53664.1001287  0.807325
+  9465.93  120341.7  53918.0998781  0.80286897
+  9470.243  119942.7  54020.0999575  0.79765793
+  9474.575  120732.7  54655.0999805  0.79253648
+  9478.927  120507.7  54672.0998274  0.79036013
+  9483.298  120277.7  54686.1001148  0.78819367
+  9487.688  120171.7  54670.1000758  0.78760461
+  9492.096  120166.7  54699.0999748  0.78703269
+  9496.523  120128.7  54699.1001178  0.78671641
+  9500.97  119962.7  54657.0998518  0.78610174
+  9505.436  120104.7  54722.1001425  0.78609621
+  9509.92  120410.7  54955.1000642  0.78439191
+  9514.424  120425.7  55198.100157  0.78010443
+  9518.946  120422.7  55500.100042  0.77462323
+  9523.488  119957.7  55765.1002763  0.76599095
+  9528.049  120487.7  56537.1001811  0.75665061
+  9532.629  120462.7  57028.1001499  0.74779603
+  9537.228  120160.7  57259.1001029  0.74124343
+  9541.846  120638.7  57860.100028  0.7347721
+  9546.482  120416.7  58061.1001881  0.72946232
+  9551.139  119757.7  58064.1001245  0.72392296
+  9555.813  120460.7  58636.1000465  0.71997301
+  9560.507  120691.7  59015.0998135  0.71544602
+  9565.22  120363.7  59182.1000648  0.70989886
+  9569.952  120488.7  59557.0997836  0.70462046
+  9574.703  120599.7  59895.0998777  0.6998821
+  9579.473  119666.7  59725.100049  0.69495801
+  9584.262  120532.7  60547.1000522  0.68849951
+  9589.07  120236.7  60725.099897  0.68310518
+  9593.896  120406.7  61094.1000405  0.67845988
+  9598.743  120575.7  61432.1000989  0.67434527
+  9603.608  120395.7  61574.100023  0.67054249
+  9608.492  120687.7  61928.100166  0.66723218
+  9613.396  120295.7  61948.1000408  0.66365594
+  9618.317  120555.7  62298.0999413  0.66018096
+  9623.259  119906.7  62148.1002537  0.65719369
+  9628.219  120302.7  62593.0998892  0.65335602
+  9633.198  120123.7  62701.10024  0.65014305
+  9638.196  119444.7  62603.099694  0.64603871
+  9643.214  120218.7  63312.0999951  0.64123612
+  9648.25  120287.7  63658.0998735  0.6363598
+  9653.306  119908.7  63752.0996937  0.6317285
+  9658.38  120259.7  64317.1002717  0.62582803
+  9663.473  119964.7  64497.1000832  0.62057727
+  9668.585  119574.7  64653.0997483  0.61490523
+  9673.717  119823.7  65185.1000406  0.60879058
+  9678.867  119220.7  65167.0997994  0.60402166
+  9684.037  119461.7  65656.1002949  0.5985653
+  9689.225  119505.7  66023.0998804  0.59335939
+  9694.433  119743.7  66550.0998559  0.58739858
+  9699.659  119955.7  67005.100138  0.58235377
+  9704.904  120644.7  67727.0998066  0.57736347
+  9710.169  120622.7  68014.0996937  0.57295246
+  9715.453  120127.7  68052.099683  0.56828176
+  9720.756  120837.7  68809.0999498  0.56311232
+  9726.077  121280.7  69437.0997804  0.55768639
+  9731.418  121236.7  69725.0996766  0.55318447
+  9736.777  120469.7  69573.1000452  0.54902027
+  9742.156  107370.7  62341.1002233  0.54366641
+  9747.554  130108.7  75758.0996632  0.54082489
+  9752.971  125993.7  73628.0999524  0.53720516
+  9758.406  124664.7  73127.1000097  0.53342871
+  9763.861  123473.7  72768.0996774  0.52875051
+  9769.335  122665.7  72556.100239  0.52510271
+  9774.827  120596.7  71578.0999625  0.52166276
+  9780.339  120778.7  72038.0999803  0.5167648
+  9785.87  120693.7  72313.0999259  0.51225063
+  9791.42  119231.7  71764.0998465  0.50768431
+  9796.988  119957.7  72445.0997834  0.50431015
+  9802.577  120261.7  72960.0996477  0.49975749
+  9808.184  120286.7  73312.0999725  0.49515239
+  9813.81  120162.7  73579.0999843  0.49048564
+  9819.454  119952.7  73787.0999138  0.48591358
+  9825.118  119913.7  74108.0999498  0.48124748
+  9830.802  119756.7  74360.099774  0.47654268
+  9836.504  118610.7  73966.1001173  0.47223982
+  9842.225  120129.7  75308.1002782  0.46698429
+  9847.965  120021.7  75593.1000445  0.46230755
+  9853.724  120016.7  75935.1001267  0.45775187
+  9859.502  115480.7  73415.0999926  0.45297378
+  9865.299  121396.7  77520.0998309  0.44852644
+  9871.115  121155.7  77705.1002318  0.4441556
+  9876.95  119624.7  77074.0996275  0.43959205
+  9882.805  120776.7  78173.0998045  0.43501779
+  9888.678  120845.7  78576.1002568  0.43044694
+  9894.57  121344.7  79266.0999367  0.42582471
+  9900.481  120620.7  79145.1003732  0.42136803
+  9906.412  120260.7  79242.1002433  0.41715416
+  9912.361  120866.7  79982.0996641  0.41288543
+  9918.329  118931.7  79033.0997393  0.40868263
+  9924.316  120895.7  80681.1002663  0.40442384
+  9930.323  120630.7  80876.0998757  0.39981546
+  9936.349  121041.7  81528.0998555  0.39518737
+  9942.393  119849.7  81088.0999856  0.39070224
+  9948.456  120201.7  81688.0998916  0.38626283
+  9954.539  120683.7  82397.1001067  0.38162283
+  9960.641  118731.7  81431.1001509  0.37710906
+  9966.761  120659.7  83117.0999849  0.37272373
+  9972.9  121011.7  83754.100034  0.36800211
+  9979.059  120708.7  83887.0998205  0.36390836
+  9985.236  119350.7  83317.0998044  0.35941241
+  9991.434  120781.7  84682.0998946  0.35508054
+  9997.648  119823.7  84391.1000023  0.35055955
+  10003.88  120512.7  85249.1002255  0.34617758
+  10010.14  119384.7  84846.1004145  0.34151202
+  10016.41  119403.7  85230.1000787  0.33715553
+  10022.7  120716.7  86580.1000942  0.33237648
+  10029.01  118280.7  85229.099856  0.32771769
+  10035.34  118950.7  86100.0998867  0.32319855
+  10041.69  117702.7  85568.1003029  0.3188494
+  10048.06  121382.7  88605.099674  0.31475895
+  10054.45  120061.7  88019.1000817  0.31045194
+  10060.85  119951.7  88304.1002304  0.30630262
+  10067.28  120488.7  89110.0998902  0.30168329
+  10073.72  118833.7  88265.1000656  0.29738025
+  10080.18  118434.7  88372.1004302  0.29280544
+  10086.66  117995.7  88449.0998063  0.28822094
+  10093.17  118435.7  89180.0997098  0.28371228
+  10099.69  117303.7  88720.0998253  0.27927983
+  10106.22  117929.7  89581.1003571  0.27494432
+  10112.78  116857.7  89144.1003332  0.27070279
+  10119.36  115791.7  88718.1000129  0.26632896
+  10125.96  111467.7  85797.099695  0.26174966
+  10132.57  110079.7  85128.099834  0.25704747
+  10139.21  104190.7  80953.0999403  0.2523529
+  10145.86  93726.7  73074.0996945  0.24890911
diff --git a/tests/data/xdi/nonxafs_2d.xdi b/tests/data/xdi/nonxafs_2d.xdi
new file mode 100644
index 0000000..e0cfe7f
--- /dev/null
+++ b/tests/data/xdi/nonxafs_2d.xdi
@@ -0,0 +1,271 @@
+# XDI/1.0 GSE/1.0
+# Column.1: energy eV
+# Column.2: i0
+# Column.3: itrans
+# Column.4: mutrans
+# Outer.name:   x2d
+# Outer.value:  1.0
+# Scan.edge_energy: 8980.0
+# Mono.name: Si 111
+# Mono.d_spacing: 3.13553
+# Beamline.name: 13ID
+# Beamline.collimation: none
+# Beamline.focusing: yes
+# Beamline.harmonic_rejection: rhodium-coated mirror
+# Facility.name: APS
+# Facility.energy: 7.00 GeV
+# Facility.xray_source: APS Undulator A
+# Scan.start_time: 2001-06-26T22:27:31
+# Detector.I0: 10cm  N2
+# Detector.I1: 10cm  N2
+# Sample.name: Cu
+# Sample.prep: Cu metal foil
+# GSE.EXTRA:  config 1
+# ///
+# Cu foil Room Temperature
+# measured at beamline 13-ID
+#----
+# energy i0 itrans mutrans
+  8779.0  149013.7  550643.089065  -1.3070486
+  8789.0  144864.7  531876.119084  -1.3006104
+  8799.0  132978.7  489591.10592  -1.3033816
+  8809.0  125444.7  463051.104096  -1.3059724
+  8819.0  121324.7  449969.103983  -1.3107085
+# Outer.value: 1.10
+  8829.0  119447.7  444386.117562  -1.3138152
+  8839.0  119100.7  440176.091039  -1.3072055
+  8849.0  117707.7  440448.106567  -1.3195882
+  8859.0  117754.7  442302.10637  -1.3233895
+# Outer.value: 1.20
+  8869.0  117428.7  441944.116528  -1.3253521
+  8879.0  117383.7  442810.120466  -1.327693
+  8889.0  117185.7  443658.11566  -1.3312944
+  8899.0  117058.7  444213.107169  -1.3336289
+  8909.0  117276.7  443655.118274  -1.3305114
+# Outer.value: 1.30
+  8919.0  117332.7  447444.089027  -1.3385381
+  8929.0  117332.7  448243.08656  -1.3403222
+  8939.0  117756.7  450590.088482  -1.3419374
+  8949.0  117199.7  445515.089564  -1.3353518
+  8959.0  117458.7  448318.080875  -1.3394162
+# Outer.value: 1.40
+  8959.5  118720.7  452987.112399  -1.33909
+  8960.0  119008.7  453897.09061  -1.3386739
+  8960.5  120520.7  459458.086604  -1.3382262
+  8961.0  121659.7  463407.085905  -1.3373781
+  8961.5  121341.7  461871.092985  -1.3366753
+# Outer.value: 1.50
+  8962.0  121394.7  462122.090047  -1.3367819
+  8962.5  121094.7  460800.080519  -1.3363914
+  8963.0  120769.7  459282.103674  -1.3357792
+  8963.5  121015.7  460053.086954  -1.3354216
+  8964.0  120395.7  457426.089176  -1.3348315
+# Outer.value: 1.60
+  8964.5  120179.7  456370.108905  -1.334316
+  8965.0  120917.7  458901.113976  -1.3337246
+  8965.5  121353.7  460121.102908  -1.3327803
+  8966.0  120788.7  457767.099353  -1.3323178
+  8966.5  120845.7  457111.080183  -1.3304119
+# Outer.value: 1.70
+  8967.0  120809.7  456945.11275  -1.3303467
+  8967.5  120816.7  456721.100387  -1.3297984
+  8968.0  121040.7  456712.117546  -1.3279264
+  8968.5  120821.7  455636.118464  -1.3273786
+# Outer.value: 1.80
+  8969.0  120986.7  455646.104782  -1.3260358
+  8969.5  121289.7  456040.079324  -1.3243988
+  8970.0  121113.7  454700.096839  -1.3229083
+  8970.5  120800.7  452979.096663  -1.3217039
+  8971.0  120024.7  449150.111057  -1.3196596
+# Outer.value: 1.90
+  8971.5  120379.7  449521.109059  -1.3175319
+  8972.0  120769.7  449996.104574  -1.3153535
+  8972.5  120602.7  448130.091064  -1.3125819
+  8973.0  120328.7  445849.104818  -1.3097534
+  8973.5  120405.7  444572.112191  -1.3062454
+# Outer.value: 2.00
+  8974.0  120519.7  443087.082423  -1.3019531
+  8974.5  120702.7  442108.088971  -1.2982239
+  8975.0  120678.7  439452.108017  -1.2923971
+  8975.5  120861.7  437344.107549  -1.2860734
+  8976.0  120656.7  433022.081423  -1.2778394
+# Outer.value: 2.10
+  8976.5  120856.7  429645.111677  -1.268354
+  8977.0  120421.7  422855.092398  -1.2560298
+  8977.5  120825.7  417044.116521  -1.238843
+  8978.0  120630.7  407292.09755  -1.2167968
+  8978.5  120845.7  393860.082322  -1.1814812
+# Outer.value: 2.20
+  8979.0  120832.7  373749.1103  -1.1291778
+  8979.5  121033.7  341663.084759  -1.0377561
+  8980.0  120305.7  285470.099526  -0.86410129
+  8980.5  121037.7  224434.100994  -0.61748006
+  8981.0  120519.7  169329.099398  -0.34003093
+# Outer.value: 2.30
+  8981.5  122539.7  144339.099533  -0.16373033
+  8982.0  121788.7  130447.100044  -0.068680205
+  8982.5  121415.7  125296.099961  -0.031459541
+  8983.0  121266.7  125935.100051  -0.037774443
+  8983.5  121720.7  130781.099967  -0.071795857
+# Outer.value: 2.40
+  8984.0  120930.7  134301.100019  -0.10486664
+  8984.5  120764.7  136416.100084  -0.12186575
+  8985.0  120680.7  134201.100471  -0.10619121
+  8985.5  121074.7  128945.100013  -0.062979022
+  8986.0  121052.7  120751.100006  0.0024945857
+# Outer.value: 2.50
+  8986.5  120823.7  114286.099966  0.055627505
+  8987.0  120819.7  108683.100371  0.10586304
+  8987.5  120508.7  103269.099677  0.15438375
+  8988.0  120647.7  97879.100478  0.20914168
+  8988.5  120841.7  92466.1003467  0.26763933
+# Outer.value: 2.60
+  8989.0  121405.7  86074.0997052  0.34392928
+  8989.5  121141.7  78746.1001681  0.43073218
+  8990.0  121046.7  70957.1001759  0.53410095
+  8990.5  121244.7  63712.100005  0.64343632
+  8991.0  120832.7  56482.1000247  0.76048317
+# Outer.value: 2.70
+  8991.5  120815.7  49455.0998374  0.89320106
+  8992.0  121341.7  44121.1002893  1.0116724
+  8992.5  121202.7  39260.1005751  1.1272556
+  8993.0  120950.7  34973.1010491  1.2408038
+  8993.5  121165.7  31819.0997413  1.3370923
+# Outer.value: 2.80
+  8994.0  120954.7  29573.1009162  1.4085509
+  8994.5  121145.7  28221.1007995  1.456924
+  8995.0  121337.7  27885.0992008  1.4704851
+  8995.5  120813.7  28091.0997043  1.4587969
+  8996.0  121141.7  29094.1008822  1.4264255
+# Outer.value: 2.90
+  8996.5  121052.7  30362.0990245  1.3830309
+  8997.0  120941.7  31979.1014993  1.330226
+  8997.5  121002.7  33461.0996421  1.2854293
+  8998.0  121188.7  34974.1016582  1.242741
+  8998.5  121138.7  36310.101112  1.2048402
+# Outer.value: 3.00
+  8999.0  120996.7  37194.1009651  1.1796131
+  8999.5  120960.7  37723.0985117  1.1651931
+  9000.0  121314.7  37878.0995107  1.1640149
+  9000.5  121168.7  37286.0994935  1.1785632
+  9001.0  121360.7  36173.0983472  1.2104514
+# Outer.value: 3.10
+  9001.5  120946.7  34370.0983609  1.258163
+  9002.0  120951.7  32474.1014225  1.3149484
+  9002.5  120887.7  30601.0987591  1.3738261
+  9003.0  120998.7  28755.0988188  1.4369647
+  9003.5  121373.7  27509.0988149  1.4843574
+# Outer.value: 3.20
+  9004.0  120709.7  26687.0996485  1.5092082
+  9004.984  121041.7  27368.1003491  1.486757
+  9005.988  120887.7  29580.0993354  1.4077602
+  9007.012  120692.7  32480.0984292  1.3126201
+  9008.053  120984.7  34952.1013495  1.2416855
+# Outer.value: 3.30
+  9009.114  120672.7  36846.1015968  1.1863321
+  9010.193  120735.7  39018.1007018  1.1295782
+  9011.293  120772.7  41039.099827  1.079385
+  9012.41  120715.7  41985.1000325  1.0561234
+  9013.548  120854.7  41895.1009468  1.0594201
+# Outer.value: 3.40
+  9014.703  120629.7  41188.1017689  1.0745761
+  9015.878  121092.7  40374.0991  1.0983679
+  9017.072  120875.7  38874.1010013  1.1344345
+  9018.285  120788.7  36969.1003508  1.1839603
+  9019.518  120999.7  34899.1008845  1.243327
+# Outer.value: 3.50
+  9020.769  120541.7  32760.1012997  1.3027844
+  9022.038  120685.7  31044.0991092  1.3577809
+  9023.327  120883.7  29564.1011517  1.4082681
+  9024.636  120691.7  28068.0988785  1.4586057
+  9025.963  120725.7  27100.1003287  1.4939836
+# Outer.value: 3.60
+  9027.309  120616.7  26972.0986672  1.4978148
+  9028.674  120830.7  27971.098825  1.4632186
+  9030.059  120639.7  29626.099643  1.4041527
+  9031.461  120397.7  31588.0988095  1.33802
+  9032.884  120036.7  33733.0992644  1.269318
+# Outer.value: 3.70
+  9034.325  121377.7  35921.100176  1.2175823
+  9035.785  120948.7  36969.0985274  1.1852841
+  9037.265  121082.7  37616.1012403  1.1690416
+  9038.763  120756.7  37556.0985899  1.167942
+  9040.28  121289.7  37212.1008075  1.1815479
+# Outer.value: 3.80
+  9041.816  120826.7  36312.0988564  1.2022063
+  9043.372  120724.7  35797.098648  1.2156459
+  9044.946  120299.7  35704.1000386  1.2147206
+  9046.54  120652.7  36149.1006714  1.2052641
+  9048.152  120559.7  36016.1001881  1.208179
+# Outer.value: 3.90
+  9049.783  120452.7  35302.0997351  1.2273147
+  9051.434  120443.7  34485.0992117  1.2506551
+  9053.104  120628.7  34146.0984743  1.2620689
+  9054.792  120364.7  34082.0993435  1.261754
+  9056.5  120251.7  33925.0997525  1.2654319
+# Outer.value: 4.00
+  9058.227  120521.7  33383.1011952  1.28378
+  9059.972  120447.7  32363.1015837  1.3141967
+  9061.736  120426.7  31464.098607  1.3421941
+  9063.521  120317.7  30803.1003099  1.3625204
+  9065.322  120372.7  30307.0986204  1.3792108
+# Outer.value: 4.10
+  9067.145  120543.7  29727.0986654  1.3999533
+  9068.985  119794.7  28765.0999294  1.4266166
+  9070.845  120186.7  27985.101158  1.4573741
+  9072.724  120213.7  27425.1010929  1.4778123
+  9074.621  120487.7  27545.100322  1.475723
+# Outer.value: 4.20
+  9076.538  120588.7  28291.1004009  1.4498383
+  9078.474  120579.7  29645.0998423  1.4030141
+  9080.429  120842.7  31326.099498  1.3500381
+  9082.402  120501.7  32743.1002572  1.3029716
+  9084.396  120409.7  34085.0984921  1.2620398
+# Outer.value: 4.30
+  9086.407  120267.7  35323.0982567  1.225183
+  9088.438  120150.7  36140.1013024  1.2013437
+  9090.488  120250.7  36597.1010203  1.1896097
+  9092.557  120386.7  37604.0990468  1.163596
+  9094.646  120571.7  39229.0991523  1.1228258
+# Outer.value: 4.40
+  9096.752  120531.7  40824.0998194  1.0826402
+  9098.878  120450.7  41893.1002104  1.0561194
+  9101.023  120209.7  41889.0986509  1.0542121
+  9103.188  120404.7  41105.0986543  1.0747264
+  9105.37  120119.7  39534.0982204  1.1113252
+# Outer.value: 4.50
+  9107.572  120080.7  37898.1014344  1.153263
+  9109.794  120161.7  36531.0993837  1.1906744
+  9112.034  119914.7  35391.0993129  1.2203203
+  9114.293  120580.7  35045.101223  1.2356834
+  9116.571  120440.7  34930.0997882  1.2378086
+# Outer.value: 4.60
+  9118.868  120496.7  35055.0985049  1.2347013
+  9121.185  120120.7  34796.0985758  1.2389918
+  9123.52  120422.7  34006.1011229  1.2644681
+  9125.874  120278.7  32222.0999167  1.317159
+  9128.247  119965.7  29872.101021  1.3902809
+# Outer.value: 4.70
+  9130.64  120456.7  28476.1003784  1.4422252
+  9133.051  120415.7  27888.1013526  1.4627498
+  9135.481  120588.7  28156.0987146  1.4546216
+  9137.931  120311.7  28653.1010131  1.4348242
+  9140.399  120317.7  29501.0998095  1.4057082
+# Outer.value: 4.80
+  9142.887  120547.7  30753.1007087  1.3660547
+  9145.393  120249.7  32463.0985228  1.3094664
+  9147.919  120056.7  34512.1015187  1.2466541
+  9150.463  120366.7  37183.0984967  1.1746886
+  9153.026  120206.7  39929.0991856  1.1021074
+# Outer.value: 4.90
+  9155.609  120165.7  42802.0981525  1.0322845
+  9158.211  120626.7  45214.0998973  0.98129167
+  9160.831  120451.7  46148.1001245  0.95939305
+  9163.471  120273.7  45254.0997822  0.97747671
+  9166.129  120243.7  43181.1007445  1.0241176
+# Outer.value: 5.00
+  9168.807  120444.7  40699.101923  1.0849847
+  9171.504  118476.7  37884.1006733  1.1401848
+  9174.22  120845.7  37318.098566  1.1750361
+  9176.954  121414.7  36823.0997413  1.1930866
+  9179.708  121351.7  36775.0983604  1.193872
diff --git a/tests/data/xdi/nonxafs_negvalues.xdi b/tests/data/xdi/nonxafs_negvalues.xdi
new file mode 100644
index 0000000..c8d94d9
--- /dev/null
+++ b/tests/data/xdi/nonxafs_negvalues.xdi
@@ -0,0 +1,23 @@
+# XDI/1.1 
+# Scan.start_time: 2015-04-13 10:36:55
+# Column.1: X
+# Column.2: Y      
+# Column.3: Z
+# Mono.d_spacing: 3.13477
+# Facility.Ring_Lifetime: 9.2  ||  S:SRlifeTimeHrsCC.VAL
+# Facility.Ring_Current: 102.1  ||  S:SRcurrentAI.VAL
+# Facility.xray_source: undultaor, 3.6 cm period, 2.1 m length
+# Facility.name: Advanced Photon Source
+# Beamline.name: GSECARS, 13-ID-E
+#--------------
+#   X     Y       Z
+ -0.500  0.150   1.000
+ -0.400  0.250   1.000
+ -0.300  0.350   2.000
+ -0.200  0.470   3.500
+ -0.100  0.520   3.800
+  0.000  0.550   4.100
+  0.200  0.590   4.400
+  0.300  0.660   4.300
+  0.400  0.710   3.900
+  0.500  0.720   3.600
diff --git a/tests/support/spec_corpus.py b/tests/support/spec_corpus.py
new file mode 100644
index 0000000..e7ea278
--- /dev/null
+++ b/tests/support/spec_corpus.py
@@ -0,0 +1,157 @@
+"""SPEC files of the validation corpus (``tests/data/spec``).
+
+The corpus holds extracts of real files: scans chosen for the conventions they
+cover, written with the file header that applies to them, sometimes limited to
+their first points. They are generated from sources at pinned commits by
+``tests/validation/make_spec_corpus.py``, which also writes the reference values
+read by spec2nexus (or by silx, for files spec2nexus cannot read).
+
+This module depends on the standard library only, so that the generator can run
+in an environment without DataLab.
+"""
+
+from __future__ import annotations
+
+import dataclasses
+import hashlib
+from pathlib import Path
+
+DATA_DIR = Path(__file__).parents[1] / "data" / "spec"
+REFERENCES = DATA_DIR / "references.json"
+
+SPEC2NEXUS_COMMIT = "7d315b23463631ae07c98a07d2abc0034e665431"
+PYMCA_COMMIT = "4fbf74ac4edc032b54d9ab05f4ddb75ca19a1aa8"
+_SPEC2NEXUS = (
+    f"https://raw.githubusercontent.com/prjemian/spec2nexus/{SPEC2NEXUS_COMMIT}/"
+    "spec2nexus/"
+)
+_PYMCA = f"https://raw.githubusercontent.com/vasole/pymca/{PYMCA_COMMIT}/src/"
+
+
+@dataclasses.dataclass(frozen=True)
+class Extract:
+    """File of the corpus, extracted from a source file.
+
+    Args:
+        filename: corpus file name
+        url: source file, at a pinned commit
+        source_sha256: SHA-256 of the source file
+        sha256: SHA-256 of the corpus file
+        covers: conventions covered by the file
+        scans: scans extracted, as ``(number, occurrence)`` (None: whole file)
+        max_points: number of points kept per scan (None: all points)
+    """
+
+    filename: str
+    url: str
+    source_sha256: str
+    sha256: str
+    covers: str
+    scans: tuple[tuple[int, int], ...] | None = None
+    max_points: int | None = None
+
+    @property
+    def path(self) -> Path:
+        """Return the corpus file path."""
+        return DATA_DIR / self.filename
+
+
+EXTRACTS = (
+    Extract(
+        "mca_spectra_example_scan1.spec",
+        _SPEC2NEXUS + "data/mca_spectra_example.dat",
+        "63b9f3eac4db8b9378f0d1ffe6573a11390100f1be07232650f41bf462c31655",
+        "2f78a026eb4610d7d62666199c5d22fe0261e8ee796b0854ecbe8cde8fee4973",
+        "4 MCA devices (@A1 to @A4), 256 channels, spectra after their point",
+        ((1, 1),),
+        3,
+    ),
+    Extract(
+        "33id_spec_mesh_escan.spec",
+        _SPEC2NEXUS + "data/33id_spec.dat",
+        "fe960985d13d8416f7f83bbd9f29f144ae098ee71392ffea3ba94d7e01036c41",
+        "8382eda7251322a60b4aeb9f065c7006d26b09b75fd8cffaa93846a969f6c07e",
+        "mesh scan with an MCA spectrum before each point, #@CHANN, duplicate "
+        "labels; Escan in keV",
+        ((22, 1), (105, 1)),
+    ),
+    Extract(
+        "issue216_scan1.spec",
+        _SPEC2NEXUS + "tests/data/issue216_scan1.spec",
+        "59a464e2540b653a7213a67d306c880b55458f0dd04166e6297630ac5b3a42e3",
+        "59a464e2540b653a7213a67d306c880b55458f0dd04166e6297630ac5b3a42e3",
+        "labels separated by single spaces",
+    ),
+    Extract(
+        "user6idd.dat",
+        _SPEC2NEXUS + "data/user6idd.dat",
+        "fe5e152fab93ad9f25e1b519b3e3bb79c0d54e924b8150d65bc140e7873919b2",
+        "fe5e152fab93ad9f25e1b519b3e3bb79c0d54e924b8150d65bc140e7873919b2",
+        "labels separated by single spaces, matching #N",
+    ),
+    Extract(
+        "20220311-161530_scan2.spec",
+        _SPEC2NEXUS + "data/20220311-161530.dat",
+        "9f135a9949750957c8cc0808f4f83eafb2babd9c7154e23bbc8df86d5623252f",
+        "705d3b568f84e6990cc9d8e214b3ded6220a7777b0c21c6e1495c0a6b897b475",
+        "Bluesky file header with empty motor lines (#O0, #o0)",
+        ((2, 1),),
+    ),
+    Extract(
+        "05_02_test_none.spec",
+        _SPEC2NEXUS + "data/05_02_test.dat",
+        "cfbd0d445df803961a0125f169414f667b240e4bc46a281206dd31448fe56242",
+        "0382b639e8c194973b8d5f9be439dd96c749b83e9a903b67230d7c9d42c1c318",
+        "Bluesky scans with a wrong #N column count, and None values",
+        ((1, 1), (1, 6)),
+    ),
+    Extract(
+        "spec_from_spock_scan1.spec",
+        _SPEC2NEXUS + "data/spec_from_spock.spc",
+        "5ae789e62a54fa6408c5bbd66efa9281a1e903971980c714a12473ec1f395615",
+        "8d732c180fd90e8239e6cf227af639e1a74ab8ba65b1bafe187ea37860502ff6",
+        "Sardana (spock) file with nan values",
+        ((1, 1),),
+    ),
+    Extract(
+        "startup_1_scan16.spec",
+        _SPEC2NEXUS + "data/startup_1.spec",
+        "8e948d1eebd0acc6813618af81188a076e1246736b813c211dc9ec54e70e6ea2",
+        "dc5a21de6abf49b59529aa58b3bdfd5b2bbeb1c6d641ea2f61a1ecad1611baee",
+        "@0 lines with continuations, which are not MCA spectra",
+        ((16, 1),),
+        3,
+    ),
+    Extract(
+        "CdSe_scan92.spec",
+        _SPEC2NEXUS + "data/CdSe",
+        "67e4b7b8518722d8e9438e7010736164ab5240efbfca520a9457dd87af411a02",
+        "a2ec02b696f819c4f2dcd9576182b426d8f35f6c3fb024d65daef6ec1c1638a5",
+        "interrupted scan ending with an incomplete data line",
+        ((92, 1),),
+    ),
+    Extract(
+        "twoc.dat",
+        _SPEC2NEXUS + "data/twoc.dat",
+        "6d6bf0fb2202e2410d6831d4fe280488569010b300aba421cf81b06e696feedf",
+        "6d6bf0fb2202e2410d6831d4fe280488569010b300aba421cf81b06e696feedf",
+        "repeated scan numbers",
+    ),
+    Extract(
+        "EXAFS_Cu.dat",
+        _PYMCA + "PyMca5/PyMcaData/EXAFS_Cu.dat",
+        "7c220b65258c13cf521c72f4ef6614f32fc9611f00e793afc4b8620f30847253",
+        "7c220b65258c13cf521c72f4ef6614f32fc9611f00e793afc4b8620f30847253",
+        "EXAFS spectrum of a copper foil (PyMca)",
+    ),
+)
+
+
+def extract(name: str) -> Extract:
+    """Return a corpus file by name."""
+    return next(item for item in EXTRACTS if item.filename == name)
+
+
+def sha256(path: Path) -> str:
+    """Return the SHA-256 of a file."""
+    return hashlib.sha256(path.read_bytes()).hexdigest()
diff --git a/tests/validation/make_spec_corpus.py b/tests/validation/make_spec_corpus.py
new file mode 100644
index 0000000..b04b15f
--- /dev/null
+++ b/tests/validation/make_spec_corpus.py
@@ -0,0 +1,210 @@
+"""Generate the SPEC validation corpus and its reference values.
+
+Run from the repository root, with network access, in a Python environment where
+spec2nexus (from the commit of the corpus sources) and silx are installed::
+
+    pip install silx "spec2nexus @ git+https://github.com/prjemian/spec2nexus@7d315b23463631ae07c98a07d2abc0034e665431"
+    python tests/validation/make_spec_corpus.py
+
+Source files are downloaded at pinned commits and checked against their SHA-256
+(``tests/support/spec_corpus.py``). Corpus files are written to
+``tests/data/spec``: whole files unchanged, extracts made of the selected scans
+preceded by the file header that applies to them, limited to their first points
+if requested. Their SHA-256 are printed, to be recorded in ``spec_corpus.py``.
+
+The values read by spec2nexus, or by silx for the files spec2nexus cannot read,
+are written to ``tests/data/spec/references.json``, so that the validation tests
+need neither: for each scan, in file order, the column labels and, for each
+column, the number of values, of NaN values, and their sum; for each MCA device,
+the number of spectra, of channels and the sum of the counts.
+"""  # noqa: E501
+
+from __future__ import annotations
+
+import contextlib
+import hashlib
+import io
+import json
+import sys
+import urllib.request
+import warnings
+from pathlib import Path
+
+import numpy as np
+
+sys.path.insert(0, str(Path(__file__).parents[1]))
+
+from support.spec_corpus import DATA_DIR, EXTRACTS, REFERENCES, Extract  # noqa: E402
+
+
+def _download(item: Extract) -> bytes:
+    """Return the source file, checked against its SHA-256 if recorded."""
+    with urllib.request.urlopen(item.url, timeout=60) as response:  # noqa: S310
+        raw = response.read()
+    digest = hashlib.sha256(raw).hexdigest()
+    if item.source_sha256 and digest != item.source_sha256:
+        raise ValueError(f"{item.url}: SHA-256 {digest} differs from the expected one")
+    print(f"{item.filename}: source SHA-256 {digest}")
+    return raw
+
+
+def _scan_lines(
+    lines: list[str], scans: tuple[tuple[int, int], ...], max_points: int | None
+) -> list[str]:
+    """Return the lines of the selected scans, each preceded by the file header
+    that applies to it (written once), and limited to their first points."""
+    wanted = set(scans)
+    out: list[str] = []
+    header: list[str] = []
+    header_written = False
+    occurrences: dict[int, int] = {}
+    selected = in_scan = stopped = continued = False
+    points = 0
+
+    def end_scan() -> None:
+        if selected and out and out[-1].strip():
+            out.append("\n")
+
+    for line in lines:
+        stripped = line.strip()
+        if line.startswith(("#F ", "#E ")):
+            end_scan()
+            header, header_written = [line], False
+            selected = in_scan = False
+        elif line.startswith("#S "):
+            end_scan()
+            number = int(line.split()[1])
+            occurrences[number] = occurrences.get(number, 0) + 1
+            selected = (number, occurrences[number]) in wanted
+            in_scan, stopped, continued, points = True, False, False, 0
+            if selected:
+                if not header_written:
+                    out.extend(header)
+                    if header and header[-1].strip():
+                        out.append("\n")
+                    header_written = True
+                out.append(line)
+        elif not in_scan:
+            header.append(line)
+        elif selected and not stopped:
+            is_point = (
+                not continued and stripped and not stripped.startswith(("#", "@"))
+            )
+            continued = stripped.endswith("\\")
+            if is_point:
+                points += 1
+                if max_points is not None and points > max_points:
+                    stopped = True
+                    continue
+            out.append(line)
+    end_scan()
+    return out
+
+
+def _keys(numbers: list[int]) -> list[str]:
+    """Return the ``<number>.<occurrence>`` keys of scans numbered in file order."""
+    occurrences: dict[int, int] = {}
+    keys = []
+    for number in numbers:
+        occurrences[number] = occurrences.get(number, 0) + 1
+        keys.append(f"{number}.{occurrences[number]}")
+    return keys
+
+
+def _column(values) -> list[float]:
+    """Return the number of values, of NaN values, and the sum of the others."""
+    array = np.asarray(values, dtype=float)
+    return [int(array.size), int(np.isnan(array).sum()), float(np.nansum(array))]
+
+
+def _spectra(spectra) -> list[float]:
+    """Return the number of spectra, of channels, and the sum of the counts."""
+    array = np.asarray(spectra, dtype=float)
+    return [int(array.shape[0]), int(array.shape[1]), float(array.sum())]
+
+
+def _spec2nexus_scans(path: Path) -> list[dict]:
+    """Return the reference values of the scans read by spec2nexus."""
+    from spec2nexus import spec  # pylint: disable=import-outside-toplevel
+
+    with contextlib.redirect_stdout(io.StringIO()), warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        scans = list(spec.SpecDataFile(str(path)).scans.values())
+        for scan in scans:
+            scan.interpret()
+    keys = _keys([int(str(scan.scanNum).split(".")[0]) for scan in scans])
+    results = []
+    for key, scan in zip(keys, scans):
+        data = scan.data
+        mca = data.get("_mca_", {})
+        results.append(
+            {
+                "key": key,
+                "labels": list(scan.L),
+                "columns": [_column(data[label]) for label in scan.L],
+                "mca": {device: _spectra(spectra) for device, spectra in mca.items()},
+            }
+        )
+    return results
+
+
+def _silx_scans(path: Path) -> list[dict]:
+    """Return the reference values of the scans read by silx."""
+    from silx.io import specfile  # pylint: disable=import-outside-toplevel
+
+    reference = specfile.SpecFile(str(path))
+    try:
+        return [
+            {
+                "key": key,
+                "labels": list(reference[key].labels),
+                "columns": [_column(values) for values in reference[key].data],
+                "mca": (
+                    {"mca": _spectra(list(reference[key].mca))}
+                    if len(reference[key].mca)
+                    else {}
+                ),
+            }
+            for key in reference.keys()
+        ]
+    finally:
+        reference.close()
+
+
+def _references(path: Path) -> dict:
+    """Return the reference values of a corpus file, and the reader used."""
+    try:
+        return {"reader": "spec2nexus", "scans": _spec2nexus_scans(path)}
+    except Exception:  # pylint: disable=broad-except
+        return {"reader": "silx", "scans": _silx_scans(path)}
+
+
+def main() -> None:
+    """Write the corpus files and their reference values."""
+    DATA_DIR.mkdir(parents=True, exist_ok=True)
+    references = {}
+    for item in EXTRACTS:
+        raw = _download(item)
+        if item.scans is None:
+            item.path.write_bytes(raw)
+        else:
+            lines = raw.decode("latin-1").splitlines(keepends=True)
+            text = "".join(_scan_lines(lines, item.scans, item.max_points))
+            item.path.write_bytes(text.encode("latin-1"))
+        digest = hashlib.sha256(item.path.read_bytes()).hexdigest()
+        print(f"{item.filename}: SHA-256 {digest}")
+        references[item.filename] = _references(item.path)
+    import silx  # pylint: disable=import-outside-toplevel
+    from spec2nexus import __version__  # pylint: disable=import-outside-toplevel
+
+    document = {
+        "spec2nexus_version": __version__,
+        "silx_version": silx.version,
+        "files": references,
+    }
+    REFERENCES.write_text(json.dumps(document, indent=1) + "\n", encoding="utf-8")
+    print(f"Wrote {REFERENCES}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/validation/test_silx_reference.py b/tests/validation/test_silx_reference.py
index 6956222..78c6efe 100644
--- a/tests/validation/test_silx_reference.py
+++ b/tests/validation/test_silx_reference.py
@@ -26,8 +26,12 @@ def test_same_values_as_silx(tmp_path: Path) -> None:
             assert info.command == expected.scan_header_dict["S"].split(maxsplit=1)[1]
             if expected.data.size:
                 assert np.array_equal(scan.data, expected.data.T)
-            assert len(scan.mca) == len(expected.mca)
-            for index, spectrum in enumerate(scan.mca):
+            # silx lists the spectra of all devices together, and reads the device
+            # number of '@A<n>' lines as a value: compare files with one '@A' device
+            assert set(scan.mca) <= {"mca"}
+            spectra = scan.mca.get("mca", ())
+            assert len(spectra) == len(expected.mca)
+            for index, spectrum in enumerate(spectra):
                 assert np.array_equal(spectrum, expected.mca[index])
             if scan.motors:
                 # silx drops the spaces inside motor names ("sample z")
diff --git a/tests/validation/test_spec_corpus.py b/tests/validation/test_spec_corpus.py
new file mode 100644
index 0000000..5853d51
--- /dev/null
+++ b/tests/validation/test_spec_corpus.py
@@ -0,0 +1,189 @@
+"""SPEC reader on extracts of real files, compared with spec2nexus.
+
+The reference values are those of spec2nexus, from the commit of the corpus
+sources, or of silx for the files spec2nexus cannot read (see
+``tests/validation/make_spec_corpus.py``). The reader differs from them on
+purpose in two cases, checked separately:
+
+- labels separated by single spaces, kept as one label by both readers, are
+  split according to the column count;
+- data lines holding ``None`` (Bluesky), dropped by spec2nexus, are read with NaN
+  values.
+"""
+
+from __future__ import annotations
+
+import json
+import math
+
+import numpy as np
+import pytest
+from sigima.objects import get_experimental_source
+from support.spec_corpus import EXTRACTS, REFERENCES, Extract, extract, sha256
+
+from datalab_synchrotron.core import SpecFile, import_scan
+from datalab_synchrotron.formats import SpecSignalFormat
+
+REFERENCE_FILES = json.loads(REFERENCES.read_text(encoding="utf-8"))["files"]
+
+#: Scans read with other values than the reference reader's, and why
+DIFFERENT_VALUES = {
+    ("05_02_test_none.spec", "1.2"): "spec2nexus drops data lines holding None",
+}
+
+
+def _spec(name: str) -> SpecFile:
+    """Return a corpus file."""
+    return SpecFile(extract(name).path)
+
+
+def _expected_labels(labels: list[str], count: int) -> list[str]:
+    """Return the reference labels, split if the reference reader kept labels
+    separated by single spaces as one label, and completed with ``column<n>`` up
+    to the number of columns."""
+    if len(labels) == 1:
+        labels = labels[0].split()
+    return labels + [f"column{index + 1}" for index in range(len(labels), count)]
+
+
+@pytest.mark.parametrize("item", EXTRACTS, ids=lambda item: item.filename)
+def test_corpus_files(item: Extract) -> None:
+    """Corpus files are those generated from the pinned sources."""
+    assert sha256(item.path) == item.sha256
+
+
+@pytest.mark.parametrize("item", EXTRACTS, ids=lambda item: item.filename)
+def test_same_values_as_reference(item: Extract) -> None:
+    """Scans, labels, column values and MCA spectra of each device are those read
+    by the reference reader."""
+    reference = REFERENCE_FILES[item.filename]
+    spec = SpecFile(item.path)
+    assert [info.key for info in spec.scans] == [
+        scan["key"] for scan in reference["scans"]
+    ]
+    for expected in reference["scans"]:
+        scan = spec.read_scan(expected["key"])
+        columns = expected["columns"]
+        assert list(scan.info.labels) == _expected_labels(
+            expected["labels"], len(columns)
+        )
+        if (item.filename, expected["key"]) in DIFFERENT_VALUES:
+            continue
+        if not columns:
+            assert scan.data.shape[0] == 0
+            continue
+        assert scan.data.shape[1] == len(columns)
+        for index, (count, nans, total) in enumerate(columns):
+            column = scan.data[:, index]
+            assert (column.size, int(np.isnan(column).sum())) == (count, nans)
+            np.testing.assert_allclose(np.nansum(column), total, rtol=1e-12)
+        mca = {
+            device: [len(spectra), spectra[0].size, float(np.sum(spectra))]
+            for device, spectra in scan.mca.items()
+        }
+        assert mca == expected["mca"]
+
+
+def test_mca_devices() -> None:
+    """The four MCA devices of a scan are imported as four images of 256
+    channels, one spectrum per point, versus the energy."""
+    spec = _spec("mca_spectra_example_scan1.spec")
+    info = spec.get_info("1.1")
+    assert info.mca_devices == ("mca1", "mca2", "mca3", "mca4")
+    devices = list(info.mca_devices)
+    group, skipped = import_scan(spec, "1.1", "Energy", [], devices)
+    assert skipped is None
+    assert [image.title for image in group.images] == [
+        f"{device} (scan 1.1)" for device in devices
+    ]
+    for image in group.images:
+        assert image.data.shape == (3, 256)
+        assert image.ylabel == "Energy"
+
+
+def test_mesh_scan() -> None:
+    """A mesh scan with an MCA spectrum per point gives an image per counter and
+    an image of the spectra; a repeated label gets a suffix."""
+    spec = _spec("33id_spec_mesh_escan.spec")
+    info = spec.get_info("22.1")
+    assert info.labels[-2:] == ("I0", "I0_1")
+    group, skipped = import_scan(spec, "22.1", "", ["elastic"], ["mca"])
+    assert skipped is None
+    mesh, mca = group.images
+    assert mesh.data.shape == (11, 11)
+    assert (mesh.xlabel, mesh.ylabel) == ("eta", "chi")
+    np.testing.assert_allclose((mesh.dx, mesh.dy), (0.01, 0.01))
+    assert mca.data.shape[0] == 121
+    assert spec.get_info("105.1").command.startswith("Escan")
+
+
+@pytest.mark.parametrize(
+    "name, key, count",
+    [("issue216_scan1.spec", "1.1", 7), ("user6idd.dat", "2.1", 25)],
+)
+def test_single_space_labels(name: str, key: str, count: int) -> None:
+    """Labels separated by single spaces are split according to the column
+    count."""
+    spec = _spec(name)
+    scan = spec.read_scan(key)
+    assert len(scan.info.labels) == count
+    assert scan.data.shape[1] == count and scan.data.shape[0] > 0
+    assert not scan.problems
+
+
+def test_empty_motor_lines() -> None:
+    """Bluesky files with empty motor lines are read, without motor positions."""
+    spec = _spec("20220311-161530_scan2.spec")
+    scan = spec.read_scan("2.1")
+    assert scan.motors == {} and scan.data.shape[0] > 0
+
+
+def test_none_values() -> None:
+    """``None`` values are NaN, and the other values of their line are kept; the
+    wrong ``#N`` count is ignored."""
+    scan = _spec("05_02_test_none.spec").read_scan("1.2")
+    assert scan.data.shape == (1, 11)
+    np.testing.assert_array_equal(
+        scan.data[0, :4], [3.806389331817627, 4.0, 30000000.0, 3724.0]
+    )
+    assert math.isnan(scan.column("scaler0")[0])
+
+
+def test_nan_values() -> None:
+    """``nan`` values are NaN."""
+    scan = _spec("spec_from_spock_scan1.spec").read_scan("1.1")
+    assert np.isnan(scan.column("lks336_outputchannela")).all()
+
+
+def test_other_at_lines() -> None:
+    """``@`` lines that are not MCA spectra are ignored with their continuations,
+    and counted in the origin of the signals."""
+    spec = _spec("startup_1_scan16.spec")
+    scan = spec.read_scan("16.1")
+    assert scan.ignored == {"@0": 3}
+    assert not scan.problems and not scan.mca
+    group, _skipped = import_scan(spec, "16.1", "TwoTheta", ["I00"])
+    source = get_experimental_source(group.signals[0])
+    assert source["details"]["ignored_lines"] == {"@0": 3}
+
+
+def test_interrupted_scan() -> None:
+    """The incomplete line of an interrupted scan, and the data line merged with a
+    comment after it, are skipped and reported."""
+    scan = _spec("CdSe_scan92.spec").read_scan("92.1")
+    incomplete, merged = scan.problems
+    assert incomplete.endswith("29 values for 55 columns")
+    assert merged.endswith("not numeric")
+    assert scan.data.shape == (19, 55)
+
+
+def test_repeated_scan_numbers() -> None:
+    """Repeated scan numbers are told apart by their occurrence."""
+    assert [info.key for info in _spec("twoc.dat").scans] == ["1.1", "2.1", "2.2"]
+
+
+def test_open_exafs_file() -> None:
+    """File > Open reads the absorption spectrum versus the energy."""
+    (signal,) = SpecSignalFormat().read(str(extract("EXAFS_Cu.dat").path))
+    assert (signal.xlabel, signal.ylabel) == ("Column 1", "Column 2")
+    assert signal.x.size > 100
diff --git a/tests/validation/test_xdi_corpus.py b/tests/validation/test_xdi_corpus.py
new file mode 100644
index 0000000..fdc7b04
--- /dev/null
+++ b/tests/validation/test_xdi_corpus.py
@@ -0,0 +1,128 @@
+"""XDI reader on the test files of the XDI library.
+
+The XDI library refuses the files whose data table is invalid, or whose header
+has a line that is not a valid field; it reads the others, warning about missing
+or invalid values (``tests/data/xdi/BadFiles.txt``). The reader refuses the same
+data tables, but reads the files with invalid header lines, recording them as
+problems: a field written by hand does not make the data unusable. It does not
+check the values of the fields (element, edge, dates...).
+"""
+
+from __future__ import annotations
+
+import hashlib
+import math
+from pathlib import Path
+
+import numpy as np
+import pytest
+from sigima.objects import get_experimental_source
+
+from datalab_synchrotron.core import read_xdi, xdi_signals
+
+DATA_DIR = Path(__file__).parents[1] / "data" / "xdi"
+
+_NOT_FIELD = "line 8: not a 'Namespace.tag: value' field"
+
+#: Reader result for each invalid file: header problems if it is read, or the
+#: error message if it is refused
+INVALID_FILES = {
+    "bad_00.xdi": (),
+    "bad_01.xdi": "is not an XDI file",
+    "bad_02.xdi": (),
+    "bad_03.xdi": (),
+    "bad_04.xdi": (),
+    "bad_05.xdi": (),
+    "bad_06.xdi": ("line 29: data without header-end line",),
+    "bad_07.xdi": (),
+    "bad_08.xdi": (),
+    "bad_09.xdi": (),
+    "bad_10.xdi": (),
+    "bad_11.xdi": (
+        "line 12: unsupported comment character '!'",
+        "line 13: unsupported comment character '!'",
+    ),
+    "bad_12.xdi": (),
+    "bad_13.xdi": "line 31: 3 values for 4 columns",
+    "bad_14.xdi": "line 36: 6 values for 4 columns",
+    "bad_15.xdi": "line 29: 'nan' is not a finite number",
+    "bad_16.xdi": "line 30: 'STRING' is not a number",
+    "bad_17.xdi": "line 29: '1.4.9' is not a number",
+    "bad_18.xdi": ("line 8: field without value",),
+    "bad_19.xdi": (_NOT_FIELD,),
+    "bad_20.xdi": (_NOT_FIELD,),
+    "bad_21.xdi": (_NOT_FIELD,),
+    "bad_22.xdi": (_NOT_FIELD,),
+    "bad_23.xdi": (),
+    "bad_24.xdi": (_NOT_FIELD,),
+    **{f"bad_{number}.xdi": () for number in range(25, 36)},
+}
+
+
+def _checksums() -> dict[str, str]:
+    """Return the SHA-256 of the corpus files, by name."""
+    lines = (DATA_DIR / "SHA256SUMS").read_text(encoding="utf-8").splitlines()
+    return {name: digest for digest, name in (line.split() for line in lines)}
+
+
+def test_corpus_files() -> None:
+    """Corpus files are those of the XDI library."""
+    checksums = _checksums()
+    assert set(checksums) == {
+        path.name for path in DATA_DIR.iterdir() if path.suffix in (".xdi", ".txt")
+    } - {"SOURCES.txt"}
+    for name, digest in checksums.items():
+        assert hashlib.sha256((DATA_DIR / name).read_bytes()).hexdigest() == digest
+
+
+@pytest.mark.parametrize("name", sorted(INVALID_FILES))
+def test_invalid_files(name: str) -> None:
+    """Invalid data tables are refused with their line, other files are read with
+    their header problems."""
+    expected = INVALID_FILES[name]
+    path = DATA_DIR / name
+    if isinstance(expected, str):
+        with pytest.raises(ValueError, match=expected):
+            read_xdi(path)
+        return
+    xdi = read_xdi(path)
+    assert xdi.problems == expected
+    assert xdi.data.shape[1] == 4
+    if expected:
+        assert xdi_signals(xdi)[0].metadata["XDI problems"] == "\n".join(expected)
+
+
+def test_column_labels() -> None:
+    """Missing column labels are named after their index."""
+    names = [column.name for column in read_xdi(DATA_DIR / "bad_10.xdi").columns]
+    assert names == ["energy", "i0", "itrans", "column4"]
+
+
+def test_angle_without_lattice_spacing() -> None:
+    """Angles are kept when the lattice spacing is not given."""
+    (signal, *_others) = xdi_signals(read_xdi(DATA_DIR / "bad_12.xdi"))
+    assert signal.xlabel == "angle"
+    assert not get_experimental_source(signal).get("conversions")
+
+
+def test_non_xafs_files() -> None:
+    """Files of other measurements and XDI 1.1 files are read."""
+    profile = read_xdi(DATA_DIR / "nonxafs_1d.xdi")
+    assert profile.columns[0].name == "x" and profile.data.shape == (408, 4)
+    negative = read_xdi(DATA_DIR / "nonxafs_negvalues.xdi")
+    assert negative.version == "1.1" and (negative.data < 0).any()
+
+
+def test_outer_scan() -> None:
+    """Two-dimensional data gives one signal per block of the outer scan."""
+    xdi = read_xdi(DATA_DIR / "nonxafs_2d.xdi")
+    assert len(xdi.outer) == 41 and xdi.outer[:2] == ((1.0, 0), (1.1, 5))
+    signals = xdi_signals(xdi, ["mutrans"])
+    assert len(signals) == 41
+    first = signals[0]
+    assert first.title == "mutrans (nonxafs_2d.xdi, x2d = 1)"
+    np.testing.assert_array_equal(first.x, xdi.data[:5, 0])
+    assert first.metadata["XDI outer value"] == 1.0
+    assert get_experimental_source(first)["selection"]["outer"] == 1.0
+    assert sum(signal.x.size for signal in signals) == xdi.data.shape[0]
+    assert not math.isnan(xdi.outer[-1][0])

From ab6288ba9ee633efd855e0655f2242c9f1085555 Mon Sep 17 00:00:00 2001
From: Pierre Raybaut <1311787+PierreRaybaut@users.noreply.github.com>
Date: Tue, 27 Oct 2026 11:44:52 +0100
Subject: [PATCH 3/4] feat: detectors of SOLEIL time scans versus time

The "Scan counters" mapping applies to detectors as well (spectra and
images per point), the time stamps describing their first dimension. Step
scans of SOLEIL, which follow the legacy NeXus conventions, are imported by
DataLab's HDF5 browser without mapping: their integration test checks it.

Assisted-by: Claude Opus 5.5
---
 .../data/mappings/scan_counters.json          |  2 +-
 tests/integration/test_desktop_adapter.py     | 64 ++++++++++++++++++-
 2 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/src/datalab_synchrotron/data/mappings/scan_counters.json b/src/datalab_synchrotron/data/mappings/scan_counters.json
index bb0d131..bfaeffb 100644
--- a/src/datalab_synchrotron/data/mappings/scan_counters.json
+++ b/src/datalab_synchrotron/data/mappings/scan_counters.json
@@ -1,7 +1,7 @@
 {
     "version": 1,
     "name": "Scan counters",
-    "description": "Counters data_1, data_2... of a scan data group, versus the time stamps time_1 of their points.",
+    "description": "Counters and detectors data_1, data_2... of a scan data group, versus the time stamps time_1 of their points (first dimension).",
     "match": {
         "attributes": {"NX_class": "NXdata"},
         "paths": ["time_1", "data_1"]
diff --git a/tests/integration/test_desktop_adapter.py b/tests/integration/test_desktop_adapter.py
index 4e84a74..82c29a2 100644
--- a/tests/integration/test_desktop_adapter.py
+++ b/tests/integration/test_desktop_adapter.py
@@ -226,7 +226,8 @@ def test_not_a_spec_file(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Non
 
 def _write_scan_file(filename: Path) -> str:
     """Write a time scan laid out as beamline scan files: legacy NXdata counters
-    without axes, Latin-1 and blank units."""
+    without axes, Latin-1 and blank units, and a detector writing a spectrum per
+    point."""
     with h5py.File(filename, "w") as h5file:
         entry = h5file.create_group("scan_00062")
         entry.attrs["NX_class"] = b"NXentry"
@@ -235,11 +236,14 @@ def _write_scan_file(filename: Path) -> str:
         scan["time_1"] = np.array([1.511, 2.126, 2.74])
         scan["time_1"].attrs["long_name"] = b"Time"
         scan["time_1"].attrs["units"] = b"s"
+        scan["time_1"].attrs["axis"] = np.int32(0)
         for index, units in ((1, b" "), (2, b"\xb5m")):
             scan[f"data_{index}"] = np.arange(3.0) + index
             scan[f"data_{index}"].attrs["signal"] = np.int32(index)
             scan[f"data_{index}"].attrs["units"] = np.bytes_(units)
             scan[f"data_{index}"].attrs["long_name"] = f"counter{index}".encode()
+        scan["data_3"] = np.arange(3 * 8, dtype=np.int32).reshape(3, 8)
+        scan["data_3"].attrs["signal"] = np.int32(3)
     return str(filename)
 
 
@@ -272,6 +276,15 @@ def test_scan_counters_mapping(tmp_path: Path) -> None:
             assert mapped["data_1"].yunit == ""
             source = get_experimental_source(signal)
             assert source["details"] == {"mapping": "Scan counters"}
+            # The detector writing a spectrum per point is an image versus time
+            (detector,) = [
+                obj
+                for obj in main.imagepanel.objmodel.get_all_objects()
+                if (get_experimental_source(obj) or {}).get("kind") == "hdf5"
+            ]
+            assert detector.data.shape == (3, 8)
+            np.testing.assert_array_equal(detector.ycoords, [1.511, 2.126, 2.74])
+            assert (detector.ylabel, detector.yunit) == ("Time", "s")
     finally:
         plugin.unregister_hooks()
     names = {mapping.name for mapping in registered_mappings()}
@@ -291,3 +304,52 @@ def test_scan_counters_mapping(tmp_path: Path) -> None:
 def _is_plugin(fmt) -> bool:
     """Return True if a format handler is defined by the plugin."""
     return fmt.__class__.__module__ == formats.__name__
+
+
+def _write_step_scan(filename: Path) -> str:
+    """Write a step scan laid out as recent SOLEIL scan files: legacy axis and
+    primary attributes, time stamps with axis 0, counters and detectors of several
+    ranks all designated as signals."""
+    with h5py.File(filename, "w") as h5file:
+        entry = h5file.create_group("scan_0494")
+        entry.attrs["NX_class"] = b"NXentry"
+        scan = entry.create_group("scan_data")
+        scan.attrs["NX_class"] = b"NXdata"
+        scan["actuator_1_1"] = np.array([-8.0, -7.8, -7.6])
+        scan["actuator_1_1"].attrs.update(axis=np.int32(1), primary=np.int32(1))
+        scan["actuator_1_1"].attrs["long_name"] = b"i06-c-c08/ex/dif-mt_rx.2/position"
+        scan["actuator_1_1"].attrs["units"] = b"\xb0"
+        scan["sensors_rel_timestamps"] = np.array([0.0, 1.1, 2.2])
+        scan["sensors_rel_timestamps"].attrs["axis"] = np.int32(0)
+        scan["data_01"] = np.array([5.0, 9.0, 4.0])
+        scan["data_02"] = np.arange(3 * 16, dtype=np.int32).reshape(3, 16)
+        scan["data_03"] = np.zeros((3, 4, 5), dtype=np.int32)
+        for name in ("data_01", "data_02", "data_03"):
+            scan[name].attrs["signal"] = np.int32(1)
+    return str(filename)
+
+
+def test_step_scan(tmp_path: Path) -> None:
+    """Step scans are imported by DataLab's HDF5 browser without data mapping:
+    counters versus the scanned motor, and detectors with the motor along Y."""
+    filename = _write_step_scan(tmp_path / "step.nxs")
+    with (
+        execenv.context(unattended=True),
+        datalab_test_app_context(console=False, exec_loop=False) as main,
+    ):
+        main.import_h5_file(filename, reset_all=True)
+        signals = [
+            obj
+            for obj in main.signalpanel.objmodel.get_all_objects()
+            if (get_experimental_source(obj) or {}).get("kind") == "nexus"
+        ]
+        (counter,) = signals
+        np.testing.assert_array_equal(counter.x, [-8.0, -7.8, -7.6])
+        assert counter.xunit == "\u00b0"
+        (detector,) = [
+            obj
+            for obj in main.imagepanel.objmodel.get_all_objects()
+            if (get_experimental_source(obj) or {}).get("kind") == "nexus"
+        ]
+        assert detector.data.shape == (3, 16)
+        assert detector.ylabel == "i06-c-c08/ex/dif-mt_rx.2/position"

From 4a813732cd16e819a4716bea42160fc1228d58fc Mon Sep 17 00:00:00 2001
From: Pierre Raybaut <1311787+PierreRaybaut@users.noreply.github.com>
Date: Tue, 27 Oct 2026 11:44:53 +0100
Subject: [PATCH 4/4] docs: describe the SPEC, XDI and NeXus support and its
 validation

Assisted-by: Claude Opus 5.5
---
 CHANGELOG.md    | 15 ++++++++-------
 CONTRIBUTING.md | 11 ++++++++---
 README.md       | 12 ++++++------
 3 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e6d40e..87db10f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,15 +8,16 @@ Python 3.10 or later is required.
 
 First version of the Synchrotron Beamline Data example plugin: a demonstration of DataLab with beamline data, not a finished or supported feature.
 
-- SPEC reader in pure Python: index of scans with repeated numbers told apart by occurrence, columns in acquisition order, motor positions from the file headers, interrupted scans, MCA spectra with continuation lines, channel range and calibration; SPEC files recognized by their content, whatever their extension.
-- **File > Open** of `.spec` files in the signal panel: one signal per scan, last column versus the first one.
-- **Plugins > Synchrotron Beamline Data > Import SPEC scans...**: selection of scans (`all`, numbers, `<number>.<occurrence>` keys, ranges), X column, counters and MCA spectra, imported in one group per scan; scans lacking a selected column are skipped and reported in one line per reason. Scans are read and added one at a time, in batches, with a progress dialog that cancels the import (the 5414 signals of a scan with 4 MCA spectra per point are added in about 6 s).
-- Origin of each signal in its `experimental_source` metadata (file, scan, columns, command, date, motor positions).
-- HDF5 data mapping "Scan counters", applied by DataLab's HDF5 browser while the plugin is loaded: each counter `data_<n>` of an `NXdata` group with `time_1` time stamps is imported versus time.
+- SPEC reader in pure Python: index of scans with repeated numbers told apart by occurrence, columns in acquisition order, motor positions from the file headers, interrupted scans, MCA spectra of one or several devices (`@A`, `@A1`, `@A2`...) with continuation lines and the channel range and calibration of each device; labels separated by single spaces split according to the column count, repeated labels with a suffix (`I0_1`), missing values (`None`, `nan`) read as NaN, empty motor lines (Bluesky) and other `@` lines accepted; SPEC files recognized by their content, whatever their extension.
+- **File > Open** of `.spec` files in the signal panel: one signal per scan, last column versus the first one; scans that cannot be read are left out.
+- **Plugins > Synchrotron Beamline Data > Import SPEC scans...**: selection of scans (`all`, numbers, `<number>.<occurrence>` keys, ranges), X column, counters and MCA devices, imported in one group per scan: counters as signals, or as images of the two motors for mesh scans (optional, NaN for the missing points of interrupted scans), and the spectra of each MCA device as an image, one spectrum per row, in the image panel. Scans lacking a selected column, or that cannot be read, are skipped and reported in one line per reason. Scans are read and added one at a time, in batches, with a progress dialog that cancels the import.
+- Origin of each object in its `experimental_source` metadata (file, scan, columns, command, date, motor positions), and scan header as metadata (count time, monitor, hkl, geometry, comments, Bluesky metadata).
+- HDF5 data mapping "Scan counters", applied by DataLab's HDF5 browser while the plugin is loaded: each counter or detector `data_<n>` of an `NXdata` group with `time_1` time stamps is imported versus time (first dimension).
 - X-ray absorption analysis core (`core.xas`): absorption from monitor and detector counts in transmission or fluorescence, with invalid points reported; edge energy E0; pre-edge and post-edge normalization and flattening. Results are identical to Larch's on 10 measured spectra (reference foils and samples, transmission and fluorescence, several beamlines), and E0 of reference foils is within 2 eV of tabulated edge energies.
 - **Plugins > Synchrotron Beamline Data > Absorption from counters...** and **Edge normalization...** recipes: `mu(E)` from the selected monitor and detector counts (monitor recognized by its name, counters of different scans refused, invalid points listed); normalized and flattened spectra with a results table (E0, edge step, fit ranges and degree), automatic or given E0 and ranges.
 - Edge normalization of spectra in keV: energies converted to eV, with the results of the same spectrum in eV, instead of fit ranges computed as if keV were eV. Energies in other units, labelled keV with values in eV, or without unit and below 150 (most likely keV) are refused before running, with the unit to set.
-- XDI reader (XAS Data Interchange 1.x) in pure Python, and **File > Open** of `.xdi` files in the signal panel: one signal per column versus the energy, with units and origin (element, edge, beamline, sample...).
+- XDI reader (XAS Data Interchange 1.x) in pure Python, reading files as the XDI library does (invalid data tables refused with their line, invalid header lines recorded, UTF-8 free text, two-dimensional data in blocks), and **File > Open** of `.xdi` files in the signal panel: one signal per column versus the energy (monochromator angles converted with the lattice spacing), with units, all header fields and comments as metadata, and origin (element, edge, beamline, sample...).
 - **Open copper foil example**: measured counts of a copper foil (Larch examples) to try the absorption and normalization recipes.
 - Application tiles on DataLab's welcome page: the plugin, **Import SPEC scans** and **Open copper foil example**, with their icons.
-- Continuous integration: lint and tests on Linux and Windows, including the comparisons with silx and Larch.
+- Continuous integration: lint and tests on Linux and Windows, including the comparisons with silx, spec2nexus (SPEC extracts of real files), the XDI library (its test files) and Larch.
+- File formats removed from Sigima when the plugin is unloaded, and registered again when it is loaded again.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 364ecdc..ec370d1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -29,8 +29,8 @@ adapters -> workflow, formats, mappings -> core
 
 - `core` holds the readers (`spec`, `xdi`), their conversion to Sigima signals with their `experimental_source`, the import plans of scans (`convert`), and the X-ray absorption analysis (`xas`). It imports neither DataLab, Qt, nor compiled reader libraries such as silx or FabIO, so that it also runs in DataLab-Web and installs from DataLab's plugin catalog.
 - `workflow` holds the recipes run by DataLab (`xas`) and the examples (`examples`, data in `data/examples` with its source and license): headless, they use DataLab's recipe and example contracts and the core only.
-- `formats.py` registers the Sigima file formats used by **File > Open**, and removes them when the plugin is unloaded.
-- `mappings.py` registers the HDF5 data mappings of `data/mappings` (JSON, see `sigimax.h5.mapping`) when the plugin is loaded, and removes them when it is unloaded. A new mapping is a new JSON file there.
+- `formats.py` registers the Sigima file formats used by **File > Open**, removes them when the plugin is unloaded and registers them again when it is loaded again (Sigima's `register_format` and `unregister_format`).
+- `mappings.py` registers the HDF5 data mappings of `data/mappings` (JSON, see `sigimax.h5.mapping`) when the plugin is loaded, and removes them when it is unloaded. A new mapping is a new JSON file there. Files following the NeXus conventions, legacy ones included (`axis` and `primary` attributes, as recent SOLEIL scans), need no mapping: DataLab's HDF5 browser imports them; mappings describe what NeXus does not, such as the time stamps of SOLEIL scans (`axis` 0).
 - `adapters/desktop.py` declares the plugin and its **Import SPEC scans...** action.
 
 `tests/unit/test_architecture.py` checks the layer boundaries.
@@ -39,7 +39,12 @@ adapters -> workflow, formats, mappings -> core
 
 - `tests/unit`: readers, conversion, formats and shipped mappings, on synthetic files (`tests/support`).
 - `tests/integration`: imports and recipes in DataLab. DataLab's plugin discovery is disabled there: DataLab would otherwise load this plugin, whether installed or found on the Python path, reload the modules patched by the tests and unregister its formats when closing.
-- `tests/validation`: the SPEC reader compared with silx's reader (skipped if silx is not installed), and the XAS analysis on measured spectra (`tests/data/xas`, from Larch's examples, MIT license) compared with Larch's results and with tabulated edge energies. Larch's results are frozen in `tests/data/xas/larch_references.json`; regenerate them with `python tests/validation/make_larch_references.py` in an environment where Larch is installed (`pip install xraylarch`).
+- `tests/validation`: the readers and the XAS analysis on real files, compared with independent readers and analysis software:
+  - SPEC reader on extracts of real files (`tests/data/spec`: several MCA devices, mesh scans, labels separated by single spaces, Bluesky and Sardana files, interrupted scans, repeated scan numbers), from spec2nexus (CC BY 4.0) and PyMca (MIT), compared with the values read by spec2nexus, or by silx for the files spec2nexus cannot read. The extracts and these values are frozen in `tests/data/spec` (sources at pinned commits and SHA-256 in `tests/support/spec_corpus.py`); regenerate them with `python tests/validation/make_spec_corpus.py` in an environment where spec2nexus, from the same commit as the sources, and silx are installed (see the script). The SPEC reader is also compared with silx's reader on synthetic files (skipped if silx is not installed).
+  - XDI reader on the test files of the XDI library (`tests/data/xdi`, public domain), checked against the behaviour of the library described in `BadFiles.txt`.
+  - XAS analysis on measured spectra (`tests/data/xas`, from Larch's examples, MIT license) compared with Larch's results and with tabulated edge energies. Larch's results are frozen in `tests/data/xas/larch_references.json`; regenerate them with `python tests/validation/make_larch_references.py` in an environment where Larch is installed (`pip install xraylarch`).
+
+Test data stays in this repository: these formats are read by the plugin, not by Sigima. Each data folder holds a `SOURCES.txt` file giving the origin, commit, license and changes of its files; files without a license allowing redistribution are not added.
 
 ## Branches
 
diff --git a/README.md b/README.md
index 10bcf91..f6ae894 100644
--- a/README.md
+++ b/README.md
@@ -2,18 +2,18 @@
 
 A [DataLab](https://datalab-platform.com/) plugin to read beamline data and analyze it in DataLab.
 
-> **Example plugin.** This plugin shows how DataLab can read beamline data and run a beamline analysis. It is a demonstration, not a finished or supported feature: its scope is limited to what is described below, its results are validated only by the tests described in [CONTRIBUTING](CONTRIBUTING.md) (SPEC reader compared with silx on synthetic files, X-ray absorption analysis compared with Larch on measured spectra), and its interface may change without notice.
+> **Example plugin.** This plugin shows how DataLab can read beamline data and run a beamline analysis. It is a demonstration, not a finished or supported feature: its scope is limited to what is described below, its results are validated only by the tests described in [CONTRIBUTING](CONTRIBUTING.md) (SPEC reader compared with spec2nexus on extracts of real files, XDI reader on the test files of the XDI library, X-ray absorption analysis compared with Larch on measured spectra), and its interface may change without notice.
 
 ## What it does
 
-- **SPEC files:** **Plugins > Synchrotron Beamline Data > Import SPEC scans...** reads any SPEC file, whatever its extension: choose the scans (`all`, or e.g. `1, 3.2, 10-12`), the X column, the counters and the MCA spectra, and each scan is imported in its own group. Scans lacking a selected column are skipped and reported in one line per reason, and a progress dialog lets you cancel a long import (e.g. thousands of MCA spectra). **File > Open** in the signal panel also reads a `.spec` file, as one signal per scan: the last column (usually the detector counts) versus the first one (usually the scanned motor). Repeated scan numbers are told apart by their occurrence (`12.1`, `12.2`), the acquisition order of the points is kept, incomplete data lines of interrupted scans are skipped and counted, and MCA spectra are read with their channel range and calibration.
-- Each signal records its origin in its `experimental_source` metadata: file, scan, columns, command, date and motor positions. A saved workspace reopens without the SPEC file or the plugin.
-- **XDI files** (XAS Data Interchange, as written by Larch, Athena and many beamlines): **File > Open** reads every column versus the energy, with units; the origin records the element, edge, facility, beamline, monochromator, sample and start time.
+- **SPEC files:** **Plugins > Synchrotron Beamline Data > Import SPEC scans...** reads any SPEC file, whatever its extension: choose the scans (`all`, or e.g. `1, 3.2, 10-12`), the X column, the counters and the MCA devices, and each scan is imported in its own group. Counters are signals versus the X column; counters of mesh scans (`mesh`, `dmesh`) are images of the two motors (optional), with NaN for the points missing in an interrupted scan; the spectra of each MCA device are an image, one spectrum per row, versus the calibrated channels and the X column (or the point number), in the image panel. Scans lacking a selected column, or that cannot be read, are skipped and reported in one line per reason, and a progress dialog lets you cancel a long import. **File > Open** in the signal panel also reads a `.spec` file, as one signal per scan: the last column (usually the detector counts) versus the first one (usually the scanned motor). Repeated scan numbers are told apart by their occurrence (`12.1`, `12.2`), the acquisition order of the points is kept, incomplete data lines of interrupted scans are skipped and counted, missing values (`None`, `nan`) are NaN, labels separated by single spaces are split according to the column count, and MCA spectra of several devices (`@A1`, `@A2`...) are read with their own channel range and calibration.
+- Each object records its origin in its `experimental_source` metadata: file, scan, columns, command, date and motor positions; the scan header (count time, monitor, hkl, geometry, comments, Bluesky metadata) is kept as `SPEC ...` metadata. A saved workspace reopens without the SPEC file or the plugin.
+- **XDI files** (XAS Data Interchange, as written by Larch, Athena and many beamlines): **File > Open** reads every column versus the energy, with units, as the XDI library does: data tables with invalid values are refused with the line number, invalid header lines are recorded (`XDI problems` metadata), free text may be UTF-8, monochromator angles are converted to energies with the lattice spacing (`Mono.d_spacing`), and two-dimensional data (`Outer.value` blocks) gives one signal per block. Every header field and the comments are kept as metadata; the origin records the element, edge, facility, beamline, monochromator, sample and start time.
 - **X-ray absorption (XANES/EXAFS):** **Absorption from counters...** computes `mu(E)` from the selected monitor (I0, recognized by its name) and detector counts, in transmission (`ln(I0/It)`) or fluorescence (`If/I0`); points without valid counts are left out and listed. **Edge normalization...** finds the edge energy E0 of each selected spectrum and normalizes it to a unit edge step, with a pre-edge line and a post-edge polynomial (automatic or given ranges), giving the normalized and flattened spectra and a table of E0, edge step and ranges. The results are those of [Larch](https://xraypy.github.io/xraylarch/) on 10 measured spectra (transmission and fluorescence, several beamlines). Energies in keV are converted to eV, and results are given in eV. Spectra are refused, with a message telling which X unit to set, if their energies are in another unit (e.g. monochromator angles in degrees), labelled keV with values in eV, or without unit and below 150 (most likely keV, as often in SPEC files); energies without unit from 150 up are taken as eV.
 - **Example:** **Open copper foil example** opens the monitor and transmitted counts of a copper foil (Larch examples, MIT license) to try both recipes: E0 is 8980.5 eV, 1.5 eV above the tabulated Cu K edge, and the edge step is 2.73.
-- NeXus files are read by DataLab itself (HDF5 browser), which shows `NXdata` groups as signals or images with their axes. While the plugin is loaded, the HDF5 browser also shows every counter `data_1`, `data_2`... of scan data groups as a signal versus the time stamps `time_1` of the points, with its label and units: such groups designate only their first counter, without axis.
+- NeXus files are read by DataLab itself (HDF5 browser), which shows `NXdata` groups as signals or images with their axes, and stacks of images or spectra as frames, including the legacy conventions of recent SOLEIL scans: counters are signals versus the scanned motor, and detectors images or stacks with the motor first. While the plugin is loaded, the HDF5 browser also shows every counter and detector `data_1`, `data_2`... of scan data groups versus the time stamps `time_1` of the points, with its label and units: such groups (time scans of SOLEIL) designate only their first counter, without axis.
 
-The readers are written in pure Python: the plugin installs from DataLab's plugin catalog, including with the standalone version of DataLab, and its core can run in DataLab-Web. silx is used only by the tests, as a reference reader.
+The readers are written in pure Python: the plugin installs from DataLab's plugin catalog, including with the standalone version of DataLab, and its core can run in DataLab-Web. silx and spec2nexus are used only by the tests, as reference readers.
 
 ## Installation