Definition

Z39.50

Contributor(s): Simon Smith

Z39.50 is a standard communications protocol for the search and retrieval of bibliographic data in online databases. Z39.50 is used on the Internet to search the Online Public Access Catalogues (OPAC) of library holdings. It is also sometimes used to link disparate OPACs into a single "union" OPAC. Z39.50 is an American National Standards Institute (ANSI/NISO) standard.

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This Z39.50 brochure provides more information.

OPAC 97 allows you to search the OPAC of the British Library .

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