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