The National Archives Catalog

Topical Subject Reference

Mandatory Repeatable Data Type Authority Entity Public Element Label
No Yes Variable Character Length (700) Topical Subject Thesaurus Product Yes Subject Term


Definition: Indicates the topics represented in the microform product.


Purpose: Enables users to search for microform products about specific topics


Relationship: This element is independent.



Choose the appropriate topical subjects from the Topical Subject Thesaurus.

This data is called an "access point." Best practice is to "anchor" or explain, all access points narratively in the descriptive record in which the access point appears. You should anchor this access point in the Microform Product Title or Abstract field.


Acid rain




Electric power


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