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 code has been added to the Genre/Form Code and Term Source Codes list for usage in appropriate fields and elements.
The code listed below was previously defined for use in Subject Heading and Term Source Codes. Usage has been expanded to Subject Category Code Source Codes.
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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