The Library of Congress >> Librarians, Archivists >> Standards
The codes listed below have been recently approved for use in MARC 21 records. The codes will be added to MARC Code Lists for Relators, Sources, Description Conventions.
The codes should not be used in exchange records until after March 26, 2010. 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.
The following code may be used in subfield $2 in field 034 in Bibliographic and Authority records (Coded Cartographic Mathematical Data).
The following code may be used in subfield $2 in fields 600-657 (Subject Added Entries/Index Terms) in Bibliographic and Community Information records; subfield 662 (Subject Added Entry) in Bibliographic records; subfield $2 in fields 700-754 (Index Terms) in Classification records; subfield $2 in fields 700-788 (Heading Linking Entries) in Authority records; and subfield $f in field 040 (Cataloging Source) in Authority records.
The following code was previously defined for usage in subfield $2 in fields 600-651 (Subject Added Entries/Index Terms) in Bibliographic records and and in subfield $f in field 040 (Cataloging Source) in Authority records.
Usage has been expanded. It may now be used in subfield $2 in fields 600-657 (Subject Added Entries/Index Terms) in Bibliographic and Community Information records; subfield $2 in field 662 (Subject Added Entry) in Bibliographic records; records; subfield $2 in fields 700-754 (Added Entry Fields) in Bibliographic records; subfield $2 in fields 700-754 (Index Terms) in Classification records; and subfield $2 in fields 700-788 (Heading Linking Entries) 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 (marc@loc.gov).
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