<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="nxdlformat.xsl" ?>
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# NeXus - Neutron and X-ray Common Data Format
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# Copyright (C) 2008-2017 NeXus International Advisory Committee (NIAC)
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<definition name="NXxbase" extends="NXobject" type="group"
category="application"
xmlns="http://definition.nexusformat.org/nxdl/3.1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://definition.nexusformat.org/nxdl/3.1 ../nxdl.xsd"
version="1.0b"
>
<doc>
This definition covers the common parts of all monochromatic single crystal raw data application definitions.
</doc>
<group type="NXentry" name="entry">
<field name="title" />
<field name="start_time" type="NX_DATE_TIME" />
<field name="definition">
<doc> Official NeXus NXDL schema to which this file conforms </doc>
<enumeration>
<item value="NXxbase"></item>
</enumeration>
</field>
<group type="NXinstrument" name="instrument">
<group type="NXsource" name="source">
<field name="type" />
<field name="name" />
<field name="probe">
<enumeration>
<item value="neutron" />
<item value="x-ray" />
<item value="electron" />
</enumeration>
</field>
</group>
<group type="NXmonochromator" name="monochromator">
<field name="wavelength" type="NX_FLOAT" units="NX_WAVELENGTH"/>
</group>
<group type="NXdetector" name="detector" maxOccurs="unbounded">
<field name="data" type="NX_INT" signal="1">
<doc>
The area detector data, the first dimension is always the
number of scan points, the second and third are the number
of pixels in x and y. The origin is always assumed to be
in the center of the detector. maxOccurs is limited to the
the number of detectors on your instrument.
</doc>
<dimensions rank="3">
<dim index="1" value="np" />
<dim index="2" value="number of x pixels" />
<dim index="3" value="number of y pixels" />
</dimensions>
<attribute name="signal" type="NX_POSINT">
<enumeration>
<item value="1" />
</enumeration>
</attribute>
</field>
<field name="x_pixel_size" type="NX_FLOAT" units="NX_LENGTH"/>
<field name="y_pixel_size" type="NX_FLOAT" units="NX_LENGTH"/>
<doc>
The name of the group is detector if there is only one detector,
if there are several, names have to be detector1,
detector2, ...detectorn.</doc>
<field name="distance" type="NX_FLOAT" units="NX_LENGTH"/>
<field name="frame_start_number" type="NX_INT">
<doc>
This is the start number of the first frame of a scan. In PX one often scans a couple
of frames on a give sample, then does something else, then returns to the same sample
and scans some more frames. Each time with a new data file.
This number helps concatenating such measurements.
</doc>
</field>
</group>
</group>
<group type="NXsample" name="sample">
<field name="name" type="NX_CHAR">
<doc>Descriptive name of sample</doc>
</field>
<field name="orientation_matrix" type="NX_FLOAT">
<doc>
The orientation matrix according to Busing and
Levy conventions. This is not strictly necessary as
the UB can always be derived from the data. But
let us bow to common usage which includes the
UB nearly always.
</doc>
<dimensions rank="2">
<dim index="1" value="3" />
<dim index="2" value="3" />
</dimensions>
</field>
<field name="unit_cell" type="NX_FLOAT">
<doc>
The unit cell, a, b, c, alpha, beta, gamma.
Again, not strictly necessary, but normally written.
</doc>
<dimensions rank="1">
<dim index="1" value="6" />
</dimensions>
</field>
<field name="temperature" type="NX_FLOAT">
<doc>
The sample temperature or whatever sensor represents this value best
</doc>
<dimensions rank="1">
<dim index="1" value="NP" />
</dimensions>
</field>
<field name="x_translation" type="NX_FLOAT" units="NX_LENGTH">
<doc>Translation of the sample along the X-direction of the laboratory coordinate system</doc>
</field>
<field name="y_translation" type="NX_FLOAT" units="NX_LENGTH">
<doc>Translation of the sample along the Y-direction of the laboratory coordinate system</doc>
</field>
<field name="distance" type="NX_FLOAT" units="NX_LENGTH">
<doc>Translation of the sample along the Z-direction of the laboratory coordinate system</doc>
</field>
</group>
<group type="NXmonitor" name="control">
<field name="mode">
<doc>
Count to a preset value based on either clock time (timer)
or received monitor counts (monitor).
</doc>
<enumeration>
<item value="monitor" />
<item value="timer" />
</enumeration>
</field>
<field name="preset" type="NX_FLOAT">
<doc>preset value for time or monitor</doc>
</field>
<field name="integral" type="NX_FLOAT" units="NX_ANY">
<doc>Total integral monitor counts</doc>
</field>
</group>
<group type="NXdata">
<doc>
The name of this group id data if there is only
one detector; if there are several the names will
be data1, data2, data3 and will point
to the corresponding detector groups in the
instrument hierarchy.
</doc>
<link name="data" target="/NXentry/NXinstrument/NXdetector/data"></link>
</group>
</group>
</definition>