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Authority records
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The most common way of enforcing authority control in a bibliographic catalog is to set up a separate index of authority records, which relates to and governs the headings used in the main catalog. This separate index is often referred to as an "authority file." It contains an indexable record of all decisions made by catalogers in a given library (or -- as is increasingly the case -- cataloguing consortium), which catalogers consult when making, or revising, decisions about headings. http://en.wikipedia.org/wiki/Authority_control (added by CALYX information essentials 20090514)

