18 search results - page 1 / 4 » Ontology Module Extraction via Datalog Reasoning |
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
Problems resulting from the management of shared, distributed knowledge has led to ontologies being employed as a solution, in order to effectively integrate information across a...
AI
2010
Springer
13 years 5 months ago
2010
Springer
We develop a formal framework for comparing different versions of ontologies, and apply it to ontologies formulated in terms of DL-Lite, a family of `lightweight' description...
WWW
2007
ACM
14 years 5 months ago
2007
ACM
The ability to extract meaningful fragments from an ontology is key for ontology re-use. We propose a definition of a module that guarantees to completely capture the meaning of a...
ICIW
2008
IEEE
13 years 11 months ago
2008
IEEE
In this paper, we present an extension of PHIL, a declarative language for filtering information from XML data. The proposed approach allows us to extract relevant data as well a...