Resource Description and Access (RDA), the successor to the Anglo-American Cataloging Rules (AACR), has had a significant impact on both bibliographic and authority data as they are represented in Machine-Readable Cataloging records in MARC 21. A brief history of the develoment of RDA is outlined. Since 2006, OCLC has kept up with some fifteen MARC 21 Bibliographic, Authority, and Holdings Updates through a total of nine OCLC-MARC Updates.

Continue reading