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Monday, July 11, 2016

MARC 21 Format for Bibliographic Data: Tag 650

Library of Congress MARC 21 Bibliographic Data at


Provides access to both the full and concise versions of the MARC 21 Format for Bibliographic Data

Here is the link to Tag 650:


Library of Congress >> MARC >> Bibliographic >> 6XX  >> 650

650 - Subject Added Entry-Topical Term (R)


MARC 21 Bibliographic - Full
October 2014

First Indicator Second Indicator 
Level of subject
# - No information provided
0 - No level specified
1 - Primary
2 - Secondary
Thesaurus
0 - Library of Congress Subject Headings
1 - LC subject headings for children's literature
2 - Medical Subject Headings
3 - National Agricultural Library subject authority file
4 - Source not specified
5 - Canadian Subject Headings
6 - Répertoire de vedettes-matière
7 - Source specified in subfield $2

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GUIDELINES FOR APPLYING CONTENT DESIGNATORS

 INDICATORS

First Indicator - Level of subject

Used to distinguish primary and secondary descriptors.
# - No information provided
0 - No level specified
Level of the subject term could be determined but is not specified.

1 - Primary
Main focus or subject content of the material.
65017$aCareer Exploration.$2ericd
650#7$aCareer Exploration.$2ericd
65017$aCooks.$2ericd
2 - Secondary
Less important aspect of the content of the material.
65027$aFood Service.$2ericd
65027$aJunior High Schools.$2ericd
65027$aSimulation.$2ericd
[Primary and secondary subject content identified.]


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