24 search results - page 1 / 5 » Practical Aspects of Query Rewriting for OWL 2 |
SEMWEB
2009
Springer
13 years 11 months ago
2009
Springer
Abstract. Query answering for the QL profile of OWL 2 and a substantial fragment of the EL profile can be implemented via query rewriting. In our previous work, we presented RQR...
DLOG
2011
12 years 8 months ago
2011
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...
WS
2008
ACM
13 years 4 months ago
2008
ACM
Since achieving W3C recommendation status in 2004, the Web Ontology Language (OWL) has been successfully applied to many problems in computer science. Practical experience with OW...
DLOG
2011
12 years 8 months ago
2011
We show that deciding conjunctive query inseparability for OWL 2 QL ontologies is PSpace-hard and in ExpTime. We give polynomial-time (incomplete) algorithms and demonstrate by exp...
CIKM
2007
Springer
13 years 11 months ago
2007
Springer
Regular path queries (RPQ’s) are given by means of regular expressions and ask for matching patterns on labeled graphs. RPQ’s have received great attention in the context of s...