The following documents the changes contained in the seventeenth update to the 1999 edition of MARC 21 Format for Authority Data.  Update No. 17 (September 2013) includes changes resulting from proposals that were considered by the MARC 21 community during June 2013.

New content designators:

Subfield codes

$q  Qualifying information (R) in 020 (International Standard Book Number)

$q  Qualifying information (R) in 024 (Other Standard Identifier)

See also:

Appendix F:  Format Change Lists