Appendix F - Format Changes
MARC 21 Holdings
May 2026
This section is provided for the lists of format changes
that accompany each update to the MARC 21 Format for
Holdings Data.
MARC 21 FORMAT FOR HOLDINGS DATA
FORMAT CHANGE LIST
Update No. 42, May 2026
There are no changes to the MARC 21 Format for
Holdings Data for Update No. 42 (May 2026)
resulting from proposals that were considered by the MARC 21
community since the publication of Update No. 41 (December 2025).