The following documents the changes contained in the twenty-third update to the 2000 edition of the MARC 21 Format for Community Information.  Update No. 23 (November 2016) includes changes resulting from proposals that were considered by the MARC 21 community during June 2016.

New content designator:

Code

u  General linking, type unspecified in Subfield code $8 - Field link and sequence number in Appendix A (Control Subfields)

Changes in content designator name and definition:

Subfield code

$0  Authority record control number or standard number redescribed in Appendix A (Control Subfields).

See also:

Appendix F:  Format Change Lists

Appendices