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 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 the newly-defined code in any validation tables.
The following source code has been added to the Name and Title Authority Source Codes list for usage in appropriate fields and elements.
The following source code has been added to the National Bibliography Number Source Codes list for usage in appropriate fields and elements.
The Technical Notice of February 14, 2025 contained the following:
nil - National Library of Israel authority file
This is not correct. It should have read:
nli - National Library of Israel authority file
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.
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