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Lecture Notes in Computer Science
We present some recent results on the definition of logicbased systems integrating ontologies and rules. In particular, we take into account ontologies expressed in Description Logics and rules expressed in Datalog (and its nonmonotonic extensions). We first introduce the main issues that arise in the integration of ontologies and rules. In particular, we focus on the following aspects: (i) from the semantic viewpoint, ontologies are based on open-world semantics, while rules are typicallydoi:10.1007/11837787_5 fatcat:yq2djlkxnvctfkhhmfsnaiazxe