Authority Control at Yale

Brief History of Automated Authority Control at Yale

In the fall of 2000, the Yale University Library began using the automated authorities service called MARS (MARC Record Service). This service corrects headings in our bibliographic records, provides us with new and updated authority records, and provides us with various useful reports. From 2000-2004, the service was owned by OCLC. In the fall of 2004, the service was acquired by Backstage Library Works.

From 1997-2000, the Library used OCLC's Authority Control Service, also called ACS. This service was discontinued and replaced by MARS. Documentation pertaining to the ACS processing has been moved to the Cataloging Archives website.

From 1997-2002, the Library used heading-level corrections, called transaction records, to update our bibliographic records. After our migration to the Voyager system in 2002, we started using full bibliographic record replacements.

Questions about the Library's automated authority control processing may be sent to the chair of the Authority Control Advisory Committee.

Comments to: Manon Théroux  <>
Last revised: 2 March 2005

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