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Dewey Decimal Classification (DDC)
"The Dewey Decimal Classification (DDC) system, devised by library pioneer Melvil Dewey in the 1870s and owned by OCLC since 1988, provides a dynamic structure for the organization of library collections...
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API
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PLOS Subject Area Thesaurus
"The 'Subject Areas' panel on each article page displays a set of terms selected for that article based on its content...
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API
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Vocabulary of the Central Library of the FFyL
"6101 terms, 1641 relations between terms, 709 equivalent terms."...
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BNCF Thesaurus (NSogg)
"Nuovo soggettario, edited by the National Central Library of Florence (Biblioteca nazionale centrale di Firenze), is a subject indexing tool for various types of information resources...
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Universal Decimal Classification (UDC)
"The Universal Decimal Classification (UDC) is the world's foremost multilingual classification scheme for all fields of knowledge, a sophisticated indexing and retrieval tool...
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Schema voor de Indeling van de Systematische Catalogus in Openbare Bibliotheken
"SISO is een numeriek systeem dat de informatieve media in uw bibliotheek naar onderwerp indeelt...
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