Scalable Web Reasoning Using Logic Programming Techniques
RR '09 Proceedings of the 3rd International Conference on Web Reasoning and Rule Systems
Parallel TBox Classification in Description Logics --First Experimental Results
Proceedings of the 2010 conference on ECAI 2010: 19th European Conference on Artificial Intelligence
Conjunctive query optimization in OWL2-DL
DEXA'11 Proceedings of the 22nd international conference on Database and expert systems applications - Volume Part II
A query language for logic architectures
PSI'09 Proceedings of the 7th international Andrei Ershov Memorial conference on Perspectives of Systems Informatics
Improving semantic web services discovery using SPARQL-based repository filtering
Web Semantics: Science, Services and Agents on the World Wide Web
Cost based query ordering over OWL ontologies
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part I
MostoDE: A tool to exchange data amongst semantic-web ontologies
Journal of Systems and Software
Optimizing SPARQL query answering over OWL ontologies
Journal of Artificial Intelligence Research
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Practical description logic systems play an ever-growing role for knowledge representation and reasoning research even in distributed environments. In particular, the ontology layer of the often-discussed semantic web is based on description logics (DLs) and defines important challenges for current system implementations. The article introduces and evaluates optimization techniques for the instance retrieval problem w.r.t. the description logic $\mathcal{SHIQ}(\mathcal{D}_{n})^{-}$ , which covers large parts of the Web Ontology Language (OWL). We demonstrate that sound and complete query engines for OWL-DL can be built for practically significant query classes. Experience with ontologies derived from database content has shown that it is often necessary to effectively solve instance retrieval problems with respect to huge amounts of data descriptions that make up major parts of ontologies. We present and analyze the main results about how to address this kind of scalability problem.