From 6858cf93fa75817ad9060584851177b54ef3c920 Mon Sep 17 00:00:00 2001
From: woutdenolf <woutdenolf@users.sf.net>
Date: Wed, 21 Jun 2023 00:02:00 +0200
Subject: [PATCH] the value of a directional NXtransformations field is ignored

---
 base_classes/NXtransformations.nxdl.xml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/base_classes/NXtransformations.nxdl.xml b/base_classes/NXtransformations.nxdl.xml
index 9be3577f26..7ca9daa81d 100644
--- a/base_classes/NXtransformations.nxdl.xml
+++ b/base_classes/NXtransformations.nxdl.xml
@@ -130,7 +130,8 @@
 				If this attribute is omitted, this is an axis for which there
 				is no motion to be specifies, such as the direction of gravity,
 				or the direction to the source, or a basis vector of a
-				coordinate frame.
+				coordinate frame. In this case the value of the ``AXISNAME`` field
+				is not used and can be set to the number ``NaN``.
 			</doc>
 			<enumeration>
 				<item value="translation" />