<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.
See appendix for information about this element in OASIS document type shells.
- map/relrow subjectScheme/subjectRel
For a complete example in the context of the
<subjectRelTable>, see Example.
The following attributes are available on this element: Universal attribute group.