<subjectRel>
The <subjectRel>
element contains a set of subjects that are related in
some manner. Each group of subjects is contained in a <subjectRole>
element; the associations between different columns in the same row are evaluated in the
same way as those in a <relrow>
(from which
<subjectRel>
is specialized) but define relationships between the
subjects instead of links between topic documents.
Category: Subject scheme elements