Appendix F - Format Changes

MARC 21 Authority

April 2015

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

MARC 21 FORMAT FOR AUTHORITY DATA

FORMAT CHANGE LIST

Update No. 20, April 2015

This page documents the changes contained in the twentieth update to the 1999 edition of the MARC 21 Format for Authority Data. Update No. 20 (April 2015) includes changes resulting from proposals that were considered by the MARC 21 community during January/February 2015.

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

■ New content designators:

Subfields

$e Number of ensembles (R) in 382 (Medium of Performance)

$q Establishment date (NR) in 046 (Special Coded Dates)

$r Termination date (NR) in 046 (Special Coded Dates)

Fields

884 Description Conversion Information (R)

■ Changes in content designator names and definitions:

Subfields

$sStart period redefined in 046 (Special Coded Dates)

$tEnd period redefined in 046 (Special Coded Dates)

UPDATE 20 LOCAL PRINT GUIDE

The following sections and fields were created/changed in Update No. 20 and should be printed to keep a print copy of the format up-to-date. Changes appear in red.