Semantic measure of fuzzy data in extended possibility-based fuzzy relational databases. (English) Zbl 0957.68038

Summary: We propose notions of equivalence and inclusion of fuzzy data in relational databases for measuring their semantic relationship. The fuzziness of data appears in attribute values in forms of possibility distribution as well as resemblance relations in attribute domain elements. An approach for evaluating semantic measures is presented. With the proposal, one can remove fuzzy data redundancy and define fuzzy functional dependency.


68P15 Database theory
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