COMCIFS / cif_core

The IUCr CIF core dictionary
14 stars 9 forks source link

Updated the description of the 'Symop' content type #470

Closed vaitkus closed 7 months ago

vaitkus commented 7 months ago

This PR explicitly specifies that the first part of a Symop values (e.g. 2 in 2_555) must be a positive integer as opposed to any integer. This limitation is imposed since the _space_group_symop.id attribute can only have integer values in the range of [1, 230]. Even if the same content type is later on reused to represent magnetic or modulated structures, the symop id will most likely still not be negative or 0.