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Chapitre D'ouvrage Année : 1998

An ordinal approach to the processing of fuzzy queries with flexible quantifiers

Résumé

This paper studies queries to a database, involving expressions of the form ‘Q A-x’s are B’s’ where A and B are properties which may be fuzzy and with respect to which objects x’s are evaluated, and where Q is a quantifier which may stand for ‘all’, or may leave room for exceptions (‘at least q%’, ‘(at least) most’, etc.). An example of such a query is ‘Find the departments where most young employees are well-paid’. Such queries are discussed from a modeling and evaluation point of view, taking also into consideration what the user intends to ask when (s)he addresses this type of queries to a database system. Clarifying what has to be evaluated is specially important in the case where A is fuzzy, since then the boundaries of A are ill-defined and A may be somewhat empty.
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Dates et versions

hal-04028802 , version 1 (16-03-2023)

Identifiants

Citer

Patrick Bosc, Ludovic Liétard, Henri Prade. An ordinal approach to the processing of fuzzy queries with flexible quantifiers. Anthony Hunter; Simon Parsons. Applications of Uncertainty Formalisms, 1455, Springer, pp.58--87, 1998, Lecture Notes in Computer Science book series (LNCS), 978-3-540-65312-7. ⟨10.1007/3-540-49426-X_4⟩. ⟨hal-04028802⟩
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