diff --git a/base_classes/NXdata.nxdl.xml b/base_classes/NXdata.nxdl.xml
index f8fe253c3a..3611a5e75a 100644
--- a/base_classes/NXdata.nxdl.xml
+++ b/base_classes/NXdata.nxdl.xml
@@ -148,9 +148,10 @@
 
 		6. The shape of an :ref:`AXISNAME </NXdata/AXISNAME-field>` field must correspond to the shape of the
 		   :ref:`DATA </NXdata/DATA-field>` dimensions it spans. This means that for each dimension ``i`` in ``[0, AXISNAME.ndim)``
-		   spanned by an :ref:`AXISNAME </NXdata/AXISNAME-field>` field the number of data points along this dimension
-		   ``DATA.shape[AXISNAME_indices[i]]`` must be equal to the number of axis values along this dimension ``AXISNAME.shape[i]``
-		   or the number of bin edges ``AXISNAME.shape[i]+1`` in case of histogram data.
+		   spanned by axis field :ref:`AXISNAME </NXdata/AXISNAME-field>`, the number of axis values ``AXISNAME.shape[i]``
+		   along dimension ``i`` must be equal to the number of data points ``DATA.shape[AXISNAME_indices[i]]`` along dimension ``i``
+		   or one more than the number of data points ``DATA.shape[AXISNAME_indices[i]]+1`` in case the
+		   :ref:`AXISNAME </NXdata/AXISNAME-field>` field contains histogram bin edges along dimension ``i``.
 
 		Highlight consequences that follow the definition