DEFINITION: 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
… Definition continues below.
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Z39.50 STANDARD DEFINITION (continued): … 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. Z39.50 Standard definition sponsored by SearchOracle.com, powered by WhatIs.com an online computer dictionary
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