TECHNICAL NOTICE (June 14, 2022) Additions to Source Codes for Vocabularies, Rules, and Schemes Network Development and MARC Standards Office Library of Congress The source code listed below has been recently approved. The code 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 code 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. Standard Identifier Source Codes The following source code has been added to the Standard Identifier Source Codes list for usage in appropriate fields and elements. Addition: bdrc - Buddhist Digital Resource Center 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.