The following documents the changes contained in the twenty-sixth update to the 1999 edition of MARC 21 Format for Bibliographic Data.  Update No. 26 (April 2018) includes changes resulting from proposals that were considered by the MARC 21 community since the publication of Update No. 25 (December 2017).

New content designators:

Subfield codes

$3  Materials specified (NR) in 377 (Associated Language)

$3  Materials specified (NR) in 380 (Form of Work)

$3  Materials specified (NR) in 381 (Other Distinguishing Characteristics of Work or Expression)

$3  Materials specified (NR) in 383 (Numeric Designation of Musical Work)

$4  Relationship (R) in 730 (Added Entry - Uniform Title)

Code

007 - Map - character position 04 (Physical medium):  code x (Not applicable)

Changes in content designator names and definitions:

Subfield codes

$r  Total number of individuals performing alongside ensembles (NR) redescribed in 382 (Medium of Performance)

Code

007/06  (Map: Production/reproduction details) code c:  Pre-production renamed Photographic pre-production and redescribed

See also:

Appendix G:  Format Change Lists

Appendices