NDLI: A Knowledge-Based Approach For Database Flexible Querying

Content Provider	IEEE Xplore Digital Library
Author	Hachani, N. Ounelli, H.
Copyright Year	2006
Description	Author affiliation: Fac. of Sci. of Bizerte (Hachani, N.)
Abstract	People have often insufficient knowledge about database structure and contents, thus frequently obtaining empty answers or having to reformulate the queries several times. This paper describes an approach extending the search criteria ranges in order to provide approximate answers to the user. This approach takes into account the user preferences. It is based on a knowledge base (KB) related to the application domain. The initial SQL query is transformed into a flexible query based on KB and fuzzy set theory. This flexible query is then rewritten into a Boolean query called envelope. The envelope is evaluated with a traditional DBMS to take advantage of its full optimization capabilities. The tuples satisfying the envelope are finally ranked according to their satisfaction degree. Unlike other approaches, this one requires to modify neither SQL language nor the database engine
Sponsorship	CPS
Starting Page	420
Ending Page	424
File Size	128856
Page Count	5
File Format	PDF
ISBN	0769526411
ISSN	15294188
DOI	10.1109/DEXA.2006.10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-04
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Database systems Proposals Fuzzy set theory Fuzzy sets Search engines Internet Concrete Expert systems
Content Type	Text
Resource Type	Article

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