The following documents the changes contained in the twenty-fifth update to the 1999 edition of MARC 21 Format for Bibliographic Data.  Update No. 25 (December 2017) includes changes resulting from proposals that were considered by the MARC 21 community during June 2017.

New content designators:

Field

758  Resource Identifier (R)

Subfield codes

$r  Report number (R) in 777 (Issue With Entry)

$u  Standard Technical Report Number (NR) in 777 (Issue With Entry)

$z  International Standard Book Number (R) in 777 (Issue With Entry)

$1  Real World Object URI (R) in:

033 (Date/Time and Place of an Event)

034 (Coded Cartographic Mathematical Data)

043 (Geographic Area Code)

050 (Library of Congress Call Number)

052 (Geographic Classification)

055 (Classification Numbers Assigned in Canada)

060 (National Library of Medicine Call Number)

070 (National Agricultural Library Call Number)

080 (Universal Decimal Classification Number)

084 (Other Classification Number)

085 (Synthesized Classification Number Components)

086 (Government Document Classification Number)

100 (Main Entry - Personal Name)

110 (Main Entry - Corporate Name)

111 (Main Entry - Meeting Name)

130 (Main Entry - Uniform Title)

240 (Uniform Title)

257 (Country of Producing Entity)

336 (Content Type)

337 (Media Type)

338 (Carrier Type)

340 (Physical Medium)

344 (Sound Characteristics)

345 (Projection Characteristics of Moving Image)

346 (Video Characteristics)

347 (Digital File Characteristics)

348 (Format of Notated Music)

370 (Associated Place)

377 (Associated Language)

380 (Form of Work)

381 (Other Distinguishing Characteristics of Work or Expression)

382 (Medium of Performance)

385 (Audience Characteristics)

386 (Creator/Contributor Characteristics)

388 (Time Period of Creation)

518 (Date/Time and Place of an Event Note)

567 (Methodology Note)

600 (Subject Added Entry - Personal Name)

610 (Subject Added Entry - Corporate Name)

611 (Subject Added Entry - Meeting Name)

630 (Subject Added Entry - Uniform Title)

647 (Subject Added Entry - Named Event)

648 (Subject Added Entry - Chronological Term)

650 (Subject Added Entry - Topical Term)

651 (Subject Added Entry - Geographic Name)

654 (Subject Added Entry - Faceted Topical Terms)

655 (Index Term - Genre/Form)

656 (Index Term - Occupation)

657 (Index Term - Function)

662 (Subject Added Entry - Hierarchical Place Name)

700 (Added Entry - Personal Name)

710 (Added Entry - Corporate Name)

711 (Added Entry - Meeting Name)

730 (Added Entry - Uniform Title)

751 (Added Entry - Geographic Name)

752 (Added Entry - Hierarchical Place Name)

753 (System Details Access to Computer Files)

754 (Added Entry - Taxonomic Identification)

800 (Series Added Entry - Personal Name)

810 (Series Added Entry - Corporate Name)

811 (Series Added Entry - Meeting Name)

830 (Series Added Entry - Uniform Title)

883 (Machine-generated Metadata Provenance)

885 (Matching Information)

Appendix A (Control Subfields)

$3  Materials specified (NR) in 384 (Key)

Changes in content designator names and definitions:

Fields

257  Country of Producing Entity field definition and scope redescribed

384  Key changed to repeatable

Subfield codes

$a  Country of producing entity redescribed in 257 (Country of Producing Entity)

$d  Date of meeting redefined as Date of meeting or treaty signing and changed to repeatable in:

111 (Main Entry - Meeting Name)

611 (Subject Added Entry - Meeting Name)

711 (Added Entry - Meeting Name)

811 (Series Added Entry - Meeting Name)

$s  Version changed to repeatable in:

130 (Main Entry - Uniform Title)

240 (Uniform Title)

243 (Collective Uniform Title)

600 (Subject Added Entry - Personal Name)

610 (Subject Added Entry - Corporate Name)

611 (Subject Added Entry - Meeting Name)

630 (Subject Added Entry - Uniform Title)

700 (Added Entry - Personal Name)

710 (Added Entry - Corporate Name)

711 (Added Entry - Meeting Name)

730 (Added Entry - Uniform Title)

800 (Series Added Entry - Personal Name)

810 (Series Added Entry - Corporate Name)

811 (Series Added Entry - Meeting Name)

830 (Series Added Entry - Uniform Title)

See also:

Appendix G:  Format Change Lists

Appendices