The following documents the changes contained in the thirtieth update to the 1999 edition of 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).

New content designator:

Indicator value

883  Metadata Provenance - 1st indicator (Method of assignment):  value 2 (Not machine-generated)

Subfield codes

$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

310  Current Publication Frequency changed to repeatable

883  Machine-generated Metadata Provenance renamed Metadata Provenance

Indicator

883  Metadata Provenance - 1st indicator:  Method of machine assignment renamed Method of assignment

Subfield codes

$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)

See also:

Appendix G:  Format Change Lists

Appendices