Additions to the MARC Code Lists for Relators, Sources, Description ConventionsNetwork Development and MARC Standards Office
Library of CongressThe codes listed below have been recently approved for use in MARC 21 records. They include 1 other sources code and 1 subject source code. These new codes will be added to the online MARC Codes Lists for Relators, Sources, Description Conventions. The codes should not be used in exchange records until after April 5, 2004. This 60-day waiting period is required to provide MARC 21 implementers with time to include newly defined codes in any validation tables they may apply to the MARC fields where these codes are used.MARC Term, Name, Title Sources Changes:
barn -subfield $2 in Bibliographic and Community Information records in fields 600-651, 655-658) [use after April 5, 2004]MARC Other Sources Changes:
doi- Digital Object Identifier (subfield $2 in Bibliographic and Authority records in field 024) [use after April 5, 2004]I think a lot of people will be glad to see DOI added. There has been discussion about using it in 024 or 856. If it is a clickable link 856 seems to be a good option, if it is in the other format 024 is the place.