412 search results - page 29 / 83 » Aggregate queries over ontologies |
EJC
2006
13 years 11 months ago
2006
With development of knowledge bases (KB) there appeared expert systems that use KBs to support them in decision making process. Decision Support Systems, that are the subject of th...
CORR
2011
Springer
13 years 1 months ago
2011
Springer
Abstract. We consider the setting of ontological database access, where an Abox is given in form of a relational database D and where a Boolean conjunctive query q has to be evalua...
SEMWEB
2009
Springer
14 years 4 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...
IJCAI
2003
13 years 11 months ago
2003
In this paper, we define a simple but scalable framework for peer-to-peer data sharing systems, in which the problem of answering queries over a network of semantically related p...
OTM
2005
Springer
14 years 3 months ago
2005
Springer
Several applications require reasoning over autonomously developed ontologies. Initially conceived to explicit the semantics of a certain domain, these ontologies become a powerfu...