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M. Dao-Tran, T. Eiter, T. Krennwallner:
"Realizing Default Logic over Description Logic Knowledge Bases";
Vortrag: 10th European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU 2009), Verona, Italy; 01.07.2009 - 03.07.2009; in: "European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU 2009)", C. Sossai, G. Chemello (Hrg.); Springer, 5590 (2009), ISBN: 978-3-642-02905-9; S. 602 - 613.

We consider a realization of Reiter-style default logic on top of description logic knowledge bases (DL-KBs). To this end, we present elegant transformations from default theories to conjunctive query (cq-)programs that combine rules and ontologies, based on different methods to find extensions of default theories. The transformations, which are implemented in a front-end to a DL-reasoner, exploit additional constraints to prune the search space via relations between default conclusions and justifications. The front-end is a flexible tool for customizing the realization, allowing to develop alternative or refined default semantics. To our knowledge, no comparable implementation is available.

Default Logic, Description Logics, Integration of Default Logic and Description Logic, Hybrid Reasoning

http://dx.doi.org/10.1007/978-3-642-02906-6_52

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