Appendix G - Format Changes

MARC 21 Bibliographic

December 2020

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

MARC 21 FORMAT FOR BIBLIOGRAPHIC DATA

FORMAT CHANGE LIST

Update No. 31, December 2020

This page documents the changes contained in the thirty-first update to the 1999 edition of the MARC 21 Format for Bibliographic Data. Update No. 31 (December 2020) includes changes resulting from proposals that were considered by the MARC 21 community since the publication of Update No. 30 (May 2020).

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

■ New content designators:

Fields

335Extension Plan (R)

881Manifestation Statements (R)

Subfields

$c Aspect ratio value (R) in 345 (Moving Image Characteristics)

$d Aspect ratio designator (R) in 345 (Moving Image Characteristics)

$p Illustrative content (R) in 340 (Physical Medium)

■ Obsolete content designators:

Subfields

The following subfields were made obsolete in field 856 (Electronic Location and Access):

$bAccess number (R)

$hProcessor of Request (NR)

$i Instruction (R)

$j Bits per second (NR)

$kPassword (NR)

$l Logon (NR)

$nName of location of host (NR)

$rSettings (NR)

$tTerminal emulation (R)

■ Changes in content designator names and definitions:

Fields

345Projection Characteristics of Moving Image renamed Moving Image Characteristics

■ Fast-track changes:

Field

043Geographic Area Code changed to repeatable

New Subfields

$0 Authority record control number or standard number (R) in 384 (Key)

$1 Real World Object URI (R) in 384 (Key)

Appendix G - Format Changes

MARC 21 FORMAT FOR BIBLIOGRAPHIC DATA

FORMAT CHANGE LIST

UPDATE 31 LOCAL PRINT GUIDE