Fuzzy Set Theory

Authored by: Donald Kraft , Gloria Bordogna , Gabriella Pasi

Encyclopedia of Library and Information Science, Fourth Edition

Print publication date:  November  2017
Online publication date:  November  2017

Print ISBN: 9781466552593
eBook ISBN: 9781315116143
Adobe ISBN:


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This entry presents a definition of fuzzy set theory and an overview of some applications to model flexible information retrieval systems. The entry focuses on a description of fuzzy indexing procedures defined to represent the varying significance of terms in synthesizing the documents’ contents, the representation of structured documents so as to model a subjective view of document content, the definition of flexible query languages which allow the expression of soft selection conditions, and fuzzy associative retrieval mechanisms to model fuzzy pseudothesauri, fuzzy ontologies, and fuzzy categorizations of documents.

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