Temporal Term Sources contains a list of sources of terms used to record time periods in bibliographic records and assigns a code to each source.  The purpose this list is to identify the vocabulary used in records.  For code assignment, general structure, usage, and maintenance guidelines see Introduction.

Note:  Many general subject lists and thesauri also contain controlled vocabularies for specifying time periods.  Thus those general sources may also be used in usage elements identified for temporal terms, with the appropriate source code (see Subject Heading and Term Source Codes).  Only sources that are specific for time periods are listed here.

Arrangement of the list

Entries in the list are arranged in alphabetical order by the code and consist of the source code followed by the bibliographic citation for the source documentation.  The citations are linked to the online source for some codes.

Code structure

Each code consists of a maximum of 12 lowercase alphabetic characters.  Possible additions to codes are described in Source Code Maintenance.

Temporal Term Source Codes

No codes are defined.

Usage in MARC 21

 Bibliographic records

388 $2 (Time Period of Creation / Source of term)

 Authority records

388 $2 (Time Period of Creation / Source of term)

MODS/MADS Elements

 mods: subject / temporal @authority

 mads: authority / temporal @authority

 mads: related / temporal @authority

 mads: variant / temporal @authority

See also:

Source Codes for Vocabularies, Rules, and Schemes:  Contents