The National Archives Catalog

Related Term (RT)

MandatoryRepeatableData TypeAuthorityPublic 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 related in definition and scope, but not broader or narrower.


Supports relationships between or among headings in a controlled vocabulary.

Supports the primary purpose of vocabulary control to achieve consistency in description and to facilitate retrieval of related concepts.

Relationship: This element is dependent on Topical Subject, Geographic Reference, Specific Records Type, or Program Area. To have a Realted Term, one of these authority headings must be created and it must be a preferred record.

For cataloging related term reference headings, see the Subject Cataloging Manual: Subject Headings (Library of Congress).

Topical Subject:
      RT: Grandfather clause (voting)
  • Suffrage
Specific Records Type:
      RT: books
  • notebooks
Program Area:
      RT: Defense communications
  • Telecommunications

Table of Contents
Lifecycle Data Requirements Guide