Broader Term (BT)
|Mandatory||Repeatable||Data Type||Authority||Public Element|
|No||Yes||Variable Character Length (700)||Topical Subject Thesaurus, Geographic Reference Thesaurus, Specific Records Type Thesaurus, and Program Area Thesaurus||Yes|
An authorized, preferred heading that is broader in definition and scope.
Supports the hierarchical relationship between or among headings in a controlled vocabulary.
For cataloging broader term reference headings, see the Subject Cataloging Manual: Subject Headings (Library of Congress).