SubjectTerm ::= (#PCDATA)
Both the start- and end-tags are required for this element.
A SubjectTerm is an individual subject word or phrase that describes the subject matter of a document or the portion of a document in which it occurs.
Subject terms are not expected to contain any markup. They are external descriptions from a controlled vocabulary.
May be formatted inline or as a displayed block, depending on context. Subject terms are rarely displayed to a reader. Usually, they are reserved for searching and retrieval purposes.
These elements contain SubjectTerm: Subject.
For examples, see SubjectSet.
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