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#1 General Acyclicity and Cyclicity Notions for the Disjunctive Skolem Chase [PDF] [Copy] [Kimi]

Authors: Lukas Gerlach ; David Carral

The disjunctive skolem chase is a sound, complete, and potentially non-terminating procedure for solving boolean conjunctive query entailment over knowledge bases of disjunctive existential rules. We develop novel acyclicity and cyclicity notions for this procedure; that is, we develop sufficient conditions to determine chase termination and non-termination. Our empirical evaluation shows that our novel notions are significantly more general than existing criteria.