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Datalog+⁄−: A Family of Logical Knowledge Representation and Query Languages for New Applications

Andrea Calì‚ Georg Gottlob‚ Thomas Lukasiewicz‚ Bruno Marnette and Andreas Pieris


This paper summarizes results on a recently introduced family of Datalog-based languages, called Datalog+/-, which is a new framework for tractable ontology querying, and for a variety of other applications. Datalog+/- extends plain Datalog by features such as existentially quantified rule heads and, at the same time, restricts the rule syntax so as to achieve decidability and tractability. In particular, we discuss three paradigms ensuring decidability: chase termination, guardedness, and stickiness.

Book Title
Proceedings of the 25th IEEE Symposium on Logic in Computer Science‚ LICS 2010‚ Edinburgh‚ UK‚ July 2010
IEEE Computer Society