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CADE
2007
Springer
15 years 10 months ago
Conservative Extensions in the Lightweight Description Logic EL
We bring together two recent trends in description logic (DL): lightweight DLs in which the subsumption problem is tractable and conservative extensions as a central tool for forma...
Carsten Lutz, Frank Wolter
DLOG
2008
15 years 5 days ago
Taming the Infinite Chase: Query Answering under Expressive Relational Constraints
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
Andrea Calì, Georg Gottlob, Michael Kifer
KI
2006
Springer
14 years 9 months ago
A New n-ary Existential Quantifier in Description Logics
Motivated by a chemical process engineering application, we introduce a new concept constructor in Description Logics (DLs), an n-ary variant of the existential restriction constr...
JAR
2007
142views more  JAR 2007»
14 years 9 months ago
Reasoning in Description Logics by a Reduction to Disjunctive Datalog
As applications of description logics proliferate, efficient reasoning with knowledge bases containing many assertions becomes ever more important. For such cases, we developed a n...
Ullrich Hustadt, Boris Motik, Ulrike Sattler
DLOG
2001
14 years 11 months ago
Preserving Modularity in XML Encoding of Description Logics
Description logics have been designed and studied in a modular way. This has allowed a methodic approach to complexity evaluation. We present a way to preserve this modularity in ...
Jérôme Euzenat