In recent work Baader has shown that a certain description logic with conjunction, existential quantification and with circular definitions has a polynomial time subsumption pro...
This is a system description of the Description Logic reasoner FaCT++. The reasoner implements a tableaux decision procedure for the well known SHOIQ description logic, with additi...
Abstract. Role-based access control (RBAC) is recognized as an excellent model for access control in large-scale networked applications. Formalization of RBAC in a logical approach...
: The growing use of XML in commercial as well as non-commercial domains to transport information poses new challenges to concepts to access these information. Common ways to acces...
Peter Baumgartner, Ulrich Furbach, Margret Gro&szl...