Occupation Term Sources contains a list of sources of terms used to record occupations in bibliographic records and assigns a code to each source.  The purpose of 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 occupations.  Thus those general sources may also be used in usage elements identified for occupation terms, with the appropriate source code (see Subject Heading and Term Source Codes).  Only sources that are specific for occupations 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.

Occupation Term Source Codes


Dictionary of occupational titles (Washington: United States Dept. of Labor, Employment and Training Administration, United States Employment Service)


IAA thesaurus: terminologie der Arbeit, Beschäftigung und Ausbildung (Genf: Internationales arbeitsamt)


ILO thesaurus: labour, employment and training terminology (Geneva: International Labour Office)


Index terms for occupations in archival and manuscript collections (Washington, DC: Library of Congress, Manuscript Division)


LC Demographic Group Terms (Washington, DC: Library of Congress)


ONET - Occupational Information Network


Occupational Outlook Handbook (U.S. Bureau of Labor Statistics)


Occupational Standard Classification of the Republic of China (中華民國職業標準分類)


Register of Australian Archives & Manuscripts Occupations Thesaurus (Canberra: National Library of Australia)


Thesaurus des descripteurs de groupes demographiques de l'Universite Laval (Quebec: Universite Laval)


Thésaurus BIT: terminologie du travail, de l'emploi et de la formation (Genève: Bureau international du travail)


Tesauro OIT: terminología del trabajo, el empleo y la formación (Geneva: Oficina Internacional del Trabajo)


Thesaurus of Religious Occupational Terms (TROT) (Chicago, Illinois: American Theological Library Association (ATLA))

Usage in MARC 21

 Bibliographic records

656 $2 (Index Term - Occupation / Source of term)

 Authority records

374 $2 (Occupation / Source of term)

 Community Information records

656 $2 (Index Term - Occupation / Source of term)

MODS/MADS Elements

 mods: subject @authority

 mads: authority / occupation @authority

 mads: related / occupation @authority

 mads: variant / occupation @authority

See also:

Source Codes for Vocabularies, Rules, and Schemes:  Contents