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Vol: 49(63) No: 3 / September 2004 How are the Attribute Linguistic Domains Involved in Database Fuzzy Queries Evaluation Cornelia Tudorie Department of Computer Science and Engineering, University Dunarea de Jos, Galati, Domneasca 111, 800201 Galati, ROMANIA, e-mail: Cornelia.Tudorie@ugal.ro Luminita Dumitriu Department of Computer Science and Engineering, University Dunarea de Jos, Galati, Domneasca 111, 800201 Galati, ROMANIA, e-mail: Luminita.Dumitriu@ugal.ro Keywords: database, flexible query, vague criteria, fuzzy logic, linguistic variable Abstract Database fuzzy queries include vague terms in selection criteria. Contrary to the classical crisp criterion, the fuzzy criterion refers linguistic values of the attribute linguistic domains. Some theoretical considerations on the attribute linguistic domains and an implemented software system for their definition are presented in the paper. A classical type of fuzzy query based on linguistic values and an original one, are compared. The paper also presents the two corresponding procedures, involving a priori defined, or dynamically defined linguistic values. References [1] I. Androutsopoulos, G.D. Ritchie and P. Thanisch. “Natural language interfaces to databases – an introduction”, In Journal of Natural Language Engineering, Cambridge University Press, 1995 [2] U. Bodenhofer, “A general framework for ordering fuzzy alternatives with respect to fuzzy orderings”, In Proceedings of 8th Int. Conf. on Information Processing and Management of Uncertainty (IPMU 2000), Madrid, 2000, pp. 1071-1077 [3] U. Bodenhofer and P. Bauer, “Towards an Axiomatic Treatment of „Interpretability””, In Proceedings of 6th International Conference on Soft Computing, Iizuka, 2000, pp. 334-339 [4] A. B. Chaudhri. “User Interfaces for Database Systems”. Requirements for the award of the MSc in Business Systems Analysis & Design, The City University, London, 1988 [5] D. Cristea. “Sistemul QUERNAL”, In Giumale, C., Preoţescu, D., Şerbănaţi, L.D., Tufiş, D., Cristea, D.: LISP, pp 215-229, Editura Tehnică, Bucureşti, 1987 [6] E. Herrera-Viedma, “An Information Retrieval System with Ordinal Linguistic Weighted Queries Based on Two Weighting Semantics”, In Proceedings of 8th International Conference on Information Processing and Management of Uncertainty in Knowledge-Bases Systems(IPMU 2000), Madrid, 2000 [7] C. Tudorie, “Studiu privind posibilitatea interogarii flexibile a bazelor de date”, Scientific Report, University ’Dunărea de Jos’, Galaţi, 2003 [8] C. Tudorie, “Cercetări privind aplicarea tehnicilor de inteligenţă artificială pentru interogarea bazelor de date”, Scientific Report, University ’Dunărea de Jos’, Galaţi, 2003 [9] C. Tudorie, “Vague criteria in relational database queries”, In Bulletin of “Dunarea de Jos” University of Galati, vol. III, pp. 43-48, 2003 [10] C. Tudorie, “Contributii la realizarea unei interfete inteligente pentru interogarea bazelor de date”, Scientific Report, University ’Dunărea de Jos’, Galati, 2003 |