| 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 |
| Definition: |
An authorized, preferred heading that is narrower in definition and scope. |
| Purpose: |
Supports the hierarchical relationship between or among headings in a controlled vocabulary. Supports the primary purpose of vocabulary control to achieve consistency in description and to facilitate retrieval based on the hierarchical relationship of concepts. |
| Relationship: | This element is dependent on Topical Subject, Geographic Reference, Specific Records Type, or Program Area. To have a Narrower Term, one of these authority headings must be created and it must be a preferred record. |
| Guidance: |
For cataloging narrower term reference headings, see the Subject Cataloging Manual: Subject Headings (Library of Congress). |
| Examples: |
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