Restore removed fields

base_classes/NXdisk_chopper.nxdl.xml

@@ -48,6 +48,14 @@
 		direction when facing the sample.
 	</doc>
 
+	<field name="type">
+		<doc>Type of the disk-chopper: only one from the enumerated list (match text exactly)</doc>
+		<enumeration>
+			<item value="Chopper type single" />
+			<item value="contra_rotating_pair" />
+			<item value="synchro_pair" />
+		</enumeration>
+	</field>
 	<field name="rotation_speed" type="NX_FLOAT" units="NX_FREQUENCY">
 		<doc>
 			Chopper rotation speed. Positive for anticlockwise rotation when
@@ -60,6 +68,9 @@
 	<field name="slit_angle" type="NX_FLOAT" units="NX_ANGLE">
 		<doc>Angular opening</doc>
 	</field>
+	<field name="pair_separation" type="NX_FLOAT" units="NX_LENGTH">
+		<doc>Disk spacing in direction of beam</doc>
+	</field>
 	<field name="slit_edges" type="NX_FLOAT" units="NX_ANGLE">
 		<doc>
 			Angle of the each edge of each slit from the position of the
@@ -103,5 +114,9 @@
 	<field name="distance" type="NX_FLOAT" units="NX_LENGTH">
 		<doc>Effective distance to the origin</doc>
 	</field>
+	<field name="wavelength_range" type="NX_FLOAT" units="NX_WAVELENGTH">
+		<doc>Low and high values of wavelength range transmitted</doc>
+		<dimensions><dim index="1" value="2"/></dimensions>
+	</field>
 	<group type="NXgeometry" />
 </definition>