The following documents the changes contained in the twentieth update to the 1999 edition of MARC 21 Format for Bibliographic Data.  Update No. 20 (April 2015) includes changes resulting from proposals that were considered by the MARC 21 community during January/February 2015.

New content designators:


884  Description Conversion Information  (R)


037  Source of Acquisition - 1st indicator (Source of acquisition sequence):  values # (Not applicable/No information provided/Earliest), 2 (Intervening), and 3 (Current/Latest)

Subfield codes

$e  Number of ensembles (R) in 382 (Medium of Performance)

$3  Materials specified (NR) in 037 (Source of Acquisition)

$5  Institution to which field applies (R) in 037 (Source of Acquisition)

Changes in content designator names and definitions:


088  Report Number - Scope broadened to include series report numbers by deletion of the sentence:  "Not used to record a number associated with a series statement."

The following fields did not have technical changes but contain editorial modifications:


The Content Designator History notes that "University presses" was removed as an example of a type of government publication in 008/28 (006/11) in the following fields:

008/28 (006/11)  Books

008/28 (006/11)  Computer files

008/28 (006/11)  Maps

008/28 (006/11)  Continuing resources

008/28 (006/11)  Visual materials

See also:

Appendix G:  Format Change Lists