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- ArticleNovember 2009
DOGMA: A Disk-Oriented Graph Matching Algorithm for RDF Databases
ISWC '09: Proceedings of the 8th International Semantic Web ConferenceNovember 2009, Pages 97–113https://doi.org/10.1007/978-3-642-04930-9_7RDF is an increasingly important paradigm for the representation of information on the Web. As RDF databases increase in size to approach tens of millions of triples, and as sophisticated graph matching queries expressible in languages like SPARQL ...
- ArticleNovember 2009
Efficient Query Answering for OWL 2
ISWC '09: Proceedings of the 8th International Semantic Web ConferenceNovember 2009, Pages 489–504https://doi.org/10.1007/978-3-642-04930-9_31The QL profile of OWL 2 has been designed so that it is possible to use database technology for query answering via query rewriting. We present a comparison of our resolution based rewriting algorithm with the standard algorithm proposed by Calvanese et ...
- ArticleNovember 2009
Executing SPARQL Queries over the Web of Linked Data
ISWC '09: Proceedings of the 8th International Semantic Web ConferenceNovember 2009, Pages 293–309https://doi.org/10.1007/978-3-642-04930-9_19The Web of Linked Data forms a single, globally distributed dataspace. Due to the openness of this dataspace, it is not possible to know in advance all data sources that might be relevant for query answering. This openness poses a new challenge that is ...
- ArticleNovember 2009
A Decomposition-Based Approach to Optimizing Conjunctive Query Answering in OWL DL
ISWC '09: Proceedings of the 8th International Semantic Web ConferenceNovember 2009, Pages 146–162https://doi.org/10.1007/978-3-642-04930-9_10Scalable query answering over Description Logic (DL) based ontologies plays an important role for the success of the Semantic Web. Towards tackling the scalability problem, we propose a decomposition-based approach to optimizing existing OWL DL ...