Appendix E - Format Changes

MARC 21 Classification

November 2016

This section is provided for the lists of format changes that accompany each update to the MARC 21 Format for Classification Data.

MARC 21 FORMAT FOR CLASSIFICATION DATA

FORMAT CHANGE LIST

Update No. 23, November 2016

This page documents the changes contained in the twenty-third update to the 1999 edition of the MARC 21 Format for Classification Data. Update No. 23 (September 2016) includes changes resulting from proposals that were considered by the MARC 21 community during June 2016.

Format changes in previous updates can be found on the MARC Format Overview page.

■ New content designators:

Codes

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

■ Changes in content designator names and definitions:

Subfields

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

UPDATE 23 LOCAL PRINT GUIDE

The following sections and fields were created/changed in Update No. 23 and should be printed to keep a print copy of the format up-to-date. Changes appear in red.

Appendix A - Control Subfields