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<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="nxdlformat.xsl" ?>
<!--
# NeXus - Neutron and X-ray Common Data Format
#
# Copyright (C) 2008-2016 NeXus International Advisory Committee (NIAC)
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#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 3 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# For further information, see http://www.nexusformat.org
-->
<definition name="NXxeuler" 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 :index:`four-circle diffractometer` with an :index:`eulerian cradle`, extends :ref:`NXxbase`
It extends :ref:`NXxbase`, so the full definition is the content
of :ref:`NXxbase` plus the data defined here. All four 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="NXxeuler"/>
</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 (two theta) where the detector is placed
at each scan point.
</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">
<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>
<field name="chi" type="NX_FLOAT" units="NX_ANGLE" axis="1">
<doc>
This is an array holding the chi angle of the eulerian
cradle at each scan point
</doc>
<dimensions rank="1">
<dim index="1" value="np" />
</dimensions>
</field>
<field name="phi" type="NX_FLOAT" units="NX_ANGLE" signal="1">
<doc>
This is an array holding the phi rotation of the eulerian
cradle 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="rotation_angle" target="/NXentry/NXsample/rotation_angle"></link>
<link name="chi" target="/NXentry/NXsample/chi"></link>
<link name="phi" target="/NXentry/NXsample/phi"></link>
</group>
</group>
</definition>