Roger Cavallo

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ABS!l’RACT A theory of probabilistic databases is outlined. This theory is one component of an integrated approach to data-modelling that accomodates both probabilistic and relational data. In fact, many of the results presented here were developed in the context of a framework for structural modelling of systems. Much that is fundamental to relational(More)
A method is presented for computing the number of elements in any collection of sets derived from other sets by statements that are reducible to conjunctions, disjunctions, and complementations. The technique also detects certain inconsistencies that may be present in the given data. The method is applicable to a wide range of problems in computer science,(More)
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