137 search results - page 11 / 28 » Query optimization for ontology-based information integratio... |
MOBIDE
2005
ACM
15 years 4 months ago
2005
ACM
We describe the DAIMON system for data integration of nomadic data. DAIMON is based on an extension of the mediator-wrapper architecture, where each node is a mediator of its own ...
ADBIS
2004
Springer
15 years 4 months ago
2004
Springer
Abstract. Query reformulation techniques based on semantic knowledge have been used in two ways in database management systems, namely for query optimization and for data integrati...
AMW
2010
15 years 16 days ago
2010
We address the problem of answering conjunctive queries over knowledge bases, specified by sets of first-order sentences called tuple-generating dependencies (TGDs). This problem i...
COOPIS
1999
IEEE
15 years 3 months ago
1999
IEEE
There is currently great interest in building information mediators that can integrate informationfrom multipledata sources such as databases or Web sources. The query response ti...
SEBD
2007
15 years 14 days ago
2007
We consider the problem of query containment over an object data model derived from F-logic. F-logic has generated considerable interest commercially, in the academia, and within ...