Istituto di Scienza e Tecnologie dell'Informazione     
Aquilino D., Asirelli P., Renso C., Turini F. An operator for composing deductive databases with theories of constraints. Internal note IEI-B4-42, 1994.
An operation for restricting deductive databases represented as logic programs is introduced. The restrictions are represented in a separate deductive database. The operation is given an abstract semantics in terms of the immediate consequence operator. A transformational implementation is given and its correctness is proved with respect to the abstract semantics.
Subject Deductive data bases
D.2.4 Software/Program Verification

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