2015 | OriginalPaper | Buchkapitel
Database Querying in the Presence of Suspect Values
verfasst von : Olivier Pivert, Henri Prade
Erschienen in: New Trends in Databases and Information Systems
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In this paper, we consider the situation where a database may contain suspect values, i.e. precise values whose validity is not certain. We propose a database model based on the notion of possibilistic certainty to deal with such values. The operators of relational algebra are extended in this framework. A very interesting aspect is that queries have the same data complexity as in a classical database context.