The following documents the changes contained in the twelfth update to the 2000 edition of MARC 21 Format for Holdings Data.  Update No. 12 (October 2010) includes changes resulting from proposals that were considered by the MARC 21 community during June 2010.

New content designator:

Subfield code

$u  Uniform Resource Identifier in 561 (Ownership and Custodial History)

See also:

Appendix F:  Format Change Lists