#edges = #data_points + 1

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