Library of Congress >> MARC >> Classification >> Appendix E

Appendix E - Format Changes

MARC 21 Classification
October 2010

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. 12, October 2010
This page documents the changes contained in the twelfth update to the 1999 edition of the MARC 21 Format for Classification Data. Update No. 12 (October 2010) includes changes resulting from proposals that were considered by the MARC 21 community during June 2010.
■ Changes in content designator names and definitions:
Subfields
$0Record control number changed to Authority record control number or standard
          number and redefined in Appendix A

UPDATE 12 LOCAL PRINT GUIDE

The following section was changed in Update No. 12 and should be printed to keep a print copy of the format up-to-date:

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