The Library of Congress >> Librarians, Archivists >> Standards
The source codes listed below have been recently approved. The codes will be added to the applicable Source Codes for Vocabularies, Rules, and Schemes lists. See the specific source code lists for current usage in MARC fields and MODS/MADS elements.
The codes should not be used in exchange records until 60 days after the date of this notice to provide implementers time to include newly-defined codes in any validation tables.
The following source codes have been added to the Genre/Form Code and Term Source Codes list for usage in appropriate fields and elements.
The following source code has been added to the Subject Heading and Term Source Codes list for usage in appropriate fields and elements.
The following source codes have been added to the Standard Identifier Source Codes list for usage in appropriate fields and elements.
On June 21, 2017 code "cbk" (Centraal Bestand Kinderboeken) was defined for usage in Subject Heading and Term Source Codes. It should have been defined for usage in Genre/Form Code and Term Source Codes. The appropriate lists have been corrected/updated.
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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