Add NXgoniometer base class

base_classes/NXgoniometer.nxdl.xml

@@ -0,0 +1,74 @@
+<?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) 2008-2025 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
+# 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 xmlns="http://definition.nexusformat.org/nxdl/3.1" category="base"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://definition.nexusformat.org/nxdl/3.1 ../nxdl.xsd"
+	name="NXgoniometer" 
+	type="group" extends="NXobject"
+	>
+
+	<doc>
+		Goniometer rotation angles and sample translations used during a
+		measurement. The goniometers used at neutron and x-ray
+		facilities are typically four-circle or six-circle goniometers,
+		or variants of either one. There is no universally recognized
+		naming convention for angles and translations, so the group
+		should contain a :ref:`NXcite` group, which describes how the
+		angles are defined.
+	</doc>
+
+    <group name="convention" type="NXcite">
+        <doc>
+            A reference to a publication or online documentation that
+            describe the convention used in this group to define the
+            names of angles and sample translations.
+        </doc>
+    </group>
+    <group type="NXcoordinate_system">
+        <doc>
+            The coordinate system used by the translation fields. This
+            group should be present if these fields do not use the
+            default NeXus Coordinate System.
+        </doc>
+    </group>
+    <field name="goniometer">
+        <doc>
+            The common name for the type of goniometer used in these
+            measurements.
+        </doc>
+    </field>
+	<field name="ROTATION_ANGLE" type="NX_FLOAT" units="NX_ANGLE" nameType="any">
+        <doc>
+            One of the goniometer rotation angles defined by the
+            specified convention.
+        </doc>
+    </field>
+    <field name="SAMPLE_TRANSLATION" type="NX_FLOAT" units="NX_LENGTH" nameType="any">
+    <doc>
+        The translation of the sample from the centre of rotation of the
+        goniometer angles along one of the coordinate axes.
+    </doc>
+</field>
+
+</definition>