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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Anti-division Queries with Ordinal Layered Preferences
verfasst von : Patrick Bosc, Olivier Pivert, Olivier Soufflet
Erschienen in: Symbolic and Quantitative Approaches to Reasoning with Uncertainty
Verlag: Springer Berlin Heidelberg
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In this paper, we are interested in taking preferences into account for a family of queries inspired by the anti-division. An anti-division query aims at retrieving the elements associated with none of the elements of a specified set of values. We suggest the introduction of preferences inside such queries with the following specificities: i) the user gives his/her preferences in an ordinal way and ii) the preferences apply to the divisor which is defined as a hierarchy of sets. Different uses of the hierarchy are investigated, which leads to queries conveying different semantics and the property of the result delivered is characterized.