@Inproceedings{motik2003oqaidludd, address = "Hamburg, Germany", author = "Boris Motik and Raphael Volz and Alexander M{\"a}dche", booktitle = "KRDB Workshop Colocated with KI 2003", title = "Optimizing Query Answering in Description Logics using DisjunctiveDeductive Databases", year = "2003", }