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TECHNICAL NOTICE (July 13, 2007)

Additions to the MARC Code Lists for Relators, Sources, Description Conventions

Network Development and MARC Standards Office
Library of Congress


The codes listed below have been recently approved for use in MARC 21 records. The codes will be added to the online MARC Code Lists for Relators, Sources, Description Conventions.

The codes should not be used in exchange records until after September 13, 2007. This 60-day waiting period is required to provide MARC 21 implementers time to include newly defined codes in any validation tables they may apply to the MARC fields where the codes are used.

National Bibliography Number

The following code is for use in subfield $2 in field 015 in Bibliographic records (National Bibliography Number).

Classification Sources

The code listed below was previously defined for use in subfield $2 in field 084 in Bibliographic and Community Information records (Other Classification Number), in subfield $2 in field 084 in Classification records (Classification Scheme and Edition) and in subfield $2 in field 065 in Authority records (Other Classification Number). Usage has been expanded to subfield $2 in field 086 in Bibliographic records (Government Document Classification Number) and subfield $2 in field 086 in Authority records (Government Document Call Number)

Term, Name, Title Sources

The following code is for use in subfield $2 in fields 600-657 in Bibliographic and Community Information records, and in subfield $f in field 040 (Cataloging Source) in Authority records.

The Library of Congress, Network Development and MARC Standards Office provides information about existing and newly assigned MARC codes on its Web site (www.loc.gov/marc/) as well as notices such as these to subscribers to its MARC listserv. ([email protected]).


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