Library of Congress >> MARC >> Bibliographic >> Appendix G

Appendix G - Format Changes


MARC 21 Bibliographic
May 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. 30, May 2020
This page documents the changes contained in the thirtieth update to the 1999 edition of the MARC 21 Format for Bibliographic Data. Update No. 30 (May 2020) includes changes resulting from proposals that were considered by the MARC 21 community since the publication of Update No. 29 (November 2019).

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

New content designators:
Indicator value
2Not machine-generated in 883 (Metadata Provenance) 1st indicator: Method of assignment
Subfields
$0 Authority record control number or standard number (NR) in 310 (Current Publication Frequency)
$0 Authority record control number or standard number (NR) in 321 (Former Publication Frequency)
$1 Real World Object URI (R) in 310 (Current Publication Frequency)
$1 Real World Object URI (R) in 321 (Former Publication Frequency)
$2 Source (NR) in 310 (Current Publication Frequency)
$2 Source (NR) in 321 (Former Publication Frequency)

Changes in content designator names and definitions:
Fields
310Current Publication Frequency changed to repeatable
883Machine-generated Metadata Provenance renamed Metadata Provenance
Indicator
1stMethod of machine assignment renamed Method of assignment in 883 (Metadata Provenance)
Subfields
$a Generation process renamed Creation process in 883 (Metadata Provenance)
$d Generation date renamed Creation date in 883 (Metadata Provenance)
$q Generation agency renamed Assigning or generating agency in 883 (Metadata Provenance)


UPDATE 30 LOCAL PRINT GUIDE

The following sections and fields were created/changed in Update No. 30 and should be printed to keep a print copy of the format up-to-date. Changes appear in red.


Library of Congress >> MARC >> Bibliographic >> Appendix G
(05/27/2020)
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