This data item provides an assessment of the coordination.
The assessment is based on comparison with the CCD. If coordination
is annotated in the CCD, then the coordination in the structure will
be compared with the reference(s) in the CCD. If there is a match
with the reference CCD, assessment will be annotated as Expected,
whereas if there is not a match, assessment will be annotated as Unexpected.
If there is no reference in the CCD, assessment will be annotated
as 'No reference'.