An extended relational algebra for fuzzy multidatabases

Author

Sharma, A.K. ; Goswami, A. ; Gupta, D.K.

Author_Institution

Dept. of Math., I.I.T., Kharagpur, India

fYear

2004

fDate

10-12 May 2004

Firstpage

445

Lastpage

450

Abstract

Recent trends in the database paradigm are to incorporate fuzzy sets to tackle imprecise and ambiguous information of real world problems. In this paper, using the concepts of fuzzy sets and possibility theory, a FTS relational model is developed to extend the TS-relational model by Ee Peng Lilm et al. (1999). The extended model integrates local fuzzy databases by merging the respective export fuzzy databases to generate a set of FTS relations of fuzzy multidatabase. A set of algebraic operations is defined to manipulate the FTS relations and their correctness is established. A set of algebraic rules is also presented to optimize FTS algebraic expressions.

Keywords

database theory; distributed databases; fuzzy set theory; possibility theory; relational algebra; algebraic operations; algebraic rules set; extended relational algebra; fuzzy multidatabases; fuzzy sets; fuzzy tuple source relational model; possibility theory; tuple source relational model; Algebra; Database systems; Distributed databases; Fuzzy sets; Mathematics; Merging; Parallel architectures; Possibility theory; Relational databases; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Parallel Architectures, Algorithms and Networks, 2004. Proceedings. 7th International Symposium on

ISSN

1087-4089

Print_ISBN

0-7695-2135-5

Type

conf

DOI

10.1109/ISPAN.2004.1300520

Filename

1300520