We present an optimized query rewriting algorithm for OWL 2 QL that computes the rewriting set of a user query by avoiding unnecessary inferences and extended clause subsumption ch...
: Object-oriented programs Dahl, Goldberg, Meyer are notoriously prone to the following kinds of error, which could lead to increasingly severe problems in the presence of tasking
In this paper we define a sequent calculus to formally specify, simulate, debug and verify security protocols. In our sequents we distinguish between the current knowledge of prin...