Title :
Functional dependencies in extended possibility-based fuzzy relational databases
Author :
Ma, Z.M. ; Zhang, W.J. ; Ma, W.Y. ; Chen, G.Q.
Author_Institution :
Dept. of Manuf. Eng. & Eng. Manage., City Univ. of Hong Kong, China
Abstract :
Based on the fuzzy relational databases where fuzziness of data appears in attribute values in the forms of possibility attributions as well as proximity relations in attribute domain elements, called extended possibility-based fuzzy relational databases, a notion of semantic equivalence of fuzzy data is introduced in this paper. Following this notion, we focus on the issues of fuzzy functional dependencies. A set of sound inference rules, which are similar to Armstrong´s axioms (1974) for classical cases, for fuzzy functional dependencies, are proposed
Keywords :
database theory; fuzzy set theory; inference mechanisms; possibility theory; relational databases; Armstrong axioms; functional dependency; fuzzy relational databases; inference rules; possibility theory; proximity relations; semantic equivalence; Chromium; Cities and towns; Data engineering; Data models; Data security; Engineering management; Fuzzy logic; Fuzzy sets; Manufacturing; Relational databases;
Conference_Titel :
Fuzzy Systems, 2000. FUZZ IEEE 2000. The Ninth IEEE International Conference on
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-5877-5
DOI :
10.1109/FUZZY.2000.839156
