The following documents the changes contained in the first update to the 1999 edition of MARC 21 Format for Bibliographic Data.  Update No. 1 (October 2000) includes changes resulting from proposals which were considered by the ALA ALCTS/LITA/RUSA Machine-Readable Bibliographic Information Committee (MARBI) at its meetings from 1999 through July 2000 and by the Canadian Committee on MARC (CCM) at its meetings from 1999 through July 2000.

New content designators:

Subfield codes

$j  Attribution qualifier in X00 (Personal Names)

$u  Uniform Resource Identifier in 505 (Formatted Contents Note)

$u  Uniform Resource Identifier in 514 (Data Quality Note)

$u  Uniform Resource Identifier in 520 (Summary, Etc.)

$u  Uniform Resource Identifier in 530 (Additional Physical Form Available Note)

$u  Uniform Resource Identifier in 545 (Biographical and Historical Data)

$u  Uniform Resource Identifier in 552 (Entity and Attribute Information Note)

$u  Uniform Resource Identifier in 555 (Cumulative Index/Finding Aids Note)

$u  Uniform Resource Identifier in 583 (Action Note)

$y  Link text in 856 (Electronic Location and Access)

$z  Display note in 514 (Data Quality Note)

$z  Display note in 552 (Entity and Attribute Information Note)

$2  Source of term in 583 (Action Note)

$6  Linkage in 050 (Library of Congress Call Number)

Code

sanb  South African National Bibliography Project in 042 (Authentication Code)

Obsolete content designator:

Subfield code

$g  Uniform Resource Name in 856 (Electronic Location and Access)

Change in content designator name:

$u  Uniform Resource Locator Identifier

Change in repeatability:

522  Geographic Coverage Note:  changed from Not repeatable (NR) to Repeatable (R)

See also:

Appendix G:  Format Change Lists

Appendices