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COMCIFS / cif_core

The IUCr CIF core dictionary
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Update the definitions of `_diffrn_refln.scale_group_code` and `_diffrn_scale_group.code` #471

Closed vaitkus closed 10 months ago

vaitkus commented 10 months ago

This PR clarifies the relationship between _diffrn_refln.scale_group_code and _diffrn_scale_group.code data items.

The previous definition of _diffrn_scale_group.code was slightly incorrect since it stated that:

The code must match a _diffrn_refln.scale_group_code in the DIFFRN_REFLN list.

while the actual relationship is the opposite -- item _diffrn_scale_group.code is the main one thus values of _diffrn_refln.scale_group_code must match the values of _diffrn_scale_group.code, but not necessarily the other way around.