The code listed below has been recently approved for use in MARC 21 records. The code will be added to MARC Code Lists for Relators, Sources, Description Conventions.
The code should not be used in exchange records until after February 16, 2008. This 60-day waiting period is required to provide MARC 21 implementers time to include newly-defined codes in any validation tables they may apply to the MARC fields where the codes are used.
Category Code Sources
The following code is for use in subfield $2 in field 072 in Authority and Bibliographic records (Subject Category Code) and in subfield $z in field 073 (Subdivision Usage) in Authority records.
Term, Name, Title Sources
The following code is for use in subfield $2 in fields 600-657 (Subject Added Entries/Index Terms) in Bibliographic and Community Information records; subfield 662 (Subject Added Entry) in Bibliographic records; subfield $2 in fields 700-754 (Index Terms) in Classification records; subfield $2 in fields 700-788 (Heading Linking Entries) in Authority records; and subfield $f in field 040 (Cataloging Source) in Authority records.