<?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
# 
# Copyright (C) 2008-2017 NeXus International Advisory Committee (NIAC)
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
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<definition name="NXxnb" extends="NXxbase" 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>
    raw data from a single crystal diffractometer, extends :ref:`NXxbase`
    
    This is the application definition for raw data from 
    a single crystal diffractometer
    measuring in normal beam mode. It extends :ref:`NXxbase`, 
    so the full definition is the content of
    :ref:`NXxbase` plus the data defined here. All angles are 
    logged in order to support arbitrary scans in
    reciprocal space.
  </doc>
  <group type="NXentry" name="entry">
    <field name="definition">
      <doc> Official NeXus NXDL schema to which this file conforms </doc>
      <enumeration>
        <item value="NXxnb"/>
      </enumeration>
    </field>
    <group type="NXinstrument" name="instrument">
      <group type="NXdetector" name="detector">
        <field name="polar_angle" type="NX_FLOAT" units="NX_ANGLE"
          axis="1">
          <doc>
            The polar_angle (gamma) of the detector for each scan point.
          </doc>
          <dimensions rank="1">
            <dim index="1" value="np" />
          </dimensions>
        </field>
        <field name="tilt_angle" type="NX_FLOAT" units="NX_ANGLE"
          axis="1">
          <doc>
            The angle by which the detector has been tilted out of the
            scattering plane.
          </doc>
          <dimensions rank="1">
            <dim index="1" value="np" />
          </dimensions>
        </field>
      </group>
    </group>
    <group type="NXsample" name="sample">
      <field name="rotation_angle" type="NX_FLOAT" units="NX_ANGLE"
        axis="1" primary="1">
        <doc>
          This is an array holding the sample rotation angle at each
          scan point
        </doc>
        <dimensions rank="1">
          <dim index="1" value="np" />
        </dimensions>
      </field>
    </group>
    <group type="NXdata" name="name">
      <link name="polar_angle" target="/NXentry/NXinstrument/NXdetector/polar_angle"></link>
      <link name="tilt" target="/NXentry/NXinstrument/NXdetector/tilt"></link>
      <link name="rotation_angle" target="/NXentry/NXsample/rotation_angle"></link>
    </group>
  </group>
</definition>