Abstract
Description logic and logic program are two important kinds of knowledge representation,with interesting,yet orthogonal expressive power.In order to ensure the decidability of the combination of description logic and logic program,Motik restricted rules to DL-safe ones.Based on the work of Motik,Horn-extended DL,by extending description logic with Horn clauses,was proposed.Then the Tableau algorithm for Horn-Extended DL was given.Finally,the correctness and efficiency of the algorithm were verified by a numerical experiment.
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