The Library of Congress >> Librarians, Archivists >> Standards
The source codes listed below have been recently approved. The codes will be added to applicable Source Codes for Vocabularies, Rules, and Schemes lists. See the specific source code list 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 Standard Identifier 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 Taxonomic Classification Source Codes list for usage in appropriate fields and elements.
The Library of Congress, Network Development and MARC Standards Office provides information about existing and newly assigned source codes on its Web site (www.loc.gov/marc/).
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