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ISO 999 (Information and documentation—Guidelines for the content, organization and presentation of indexes) is anISOstandard which provides the information industry with guidelines for the content, organisation andpresentation ofindexes to a wide range of documents including books,Periodicals,electronic documents,films,images,maps, and three-dimensional objects.[1] It covers the choice and form ofheadings and subheadings used in index entries once the subjects to be indexed have been determined.
ISO999:1996 is a complete revision and expansion of the first (1975) edition of this International Standard on indexes. It was prepared by ISO Technical Committee (TC) 46, Subcommittee (SC) 9 which develops International Standards for the identification and description of information resources.
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