686 search results - page 36 / 138 » Query Answering in Peer-to-Peer Data Exchange Systems |
198
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DLOG
2011
14 years 9 months ago
2011
Query answering in Ontology Based Data Access (OBDA) exploits the knowledge of an ontology’s TBox to deal with incompleteness of the ABox (or data source). Current query-answerin...
144
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SIGMOD
1995
ACM
15 years 9 months ago
1995
ACM
When querying a temporal database, a user often makes certain semantic assumptions on stored temporal data. This paper formalizes and studies two types of semantic assumptions: po...
172
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EDBT
2009
ACM
15 years 9 months ago
2009
ACM
In emerging applications such as location-based services, sensor monitoring and biological management systems, the values of the database items are naturally imprecise. For these ...
302
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ICDE
2007
IEEE
16 years 7 months ago
2007
IEEE
We study the problem of answering queries posed on virtual views of XML documents, a problem commonly encountered when enforcing XML access control and integrating data. We approa...
177
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WECWIS
2008
IEEE
16 years 16 days ago
2008
IEEE
We present ISENS, a distributed, end-to-end, ontologybased information integration system. In response to a user’s query, our system is capable of retrieving facts from data sou...