Appendix G - Format Changes
MARC 21 Bibliographic
December 2023
This section is provided for the lists of format changes
that accompany each update to the MARC 21 Format for
Bibliographic Data.
MARC 21 FORMAT FOR BIBLIOGRAPHIC DATA
FORMAT CHANGE LIST
Update No. 37, December 2023
This page documents the changes contained in the thirty-seventh
update to the 1999 edition of the MARC 21 Format for
Bibliographic Data. Update No. 37 (December 2023)
includes changes resulting from proposals that were
considered by the MARC 21 community since the publication of Update No. 36 (June 2023).
UPDATE 37 CHANGES
■ New content designators:
Field
023Cluster ISSN (R)
■ Obsolete content designators:
Subfields
$l ISSN-L (NR) in 022 (International Standard Serial Number)
$mCanceled ISSN-L (R) in 022 (International Standard Serial Number)
■ Fast-track change:
New Subfield
$3 Materials specified (NR) in 532 (Accessibility Note)