27756 search results - page 417 / 5552 » Process Query Systems |
166
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DPD
2002
15 years 4 months ago
2002
The mediator-wrapper approach to integrate data from heterogeneous data sources has usually been centralized in the sense that a single mediator system is placed between a number o...
140
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SIGMOD
2001
ACM
16 years 4 months ago
2001
ACM
Users often need to optimize the selection of objects by appropriately weighting the importance of multiple object attributes. Such optimization problems appear often in operation...
160
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SSD
2007
Springer
15 years 11 months ago
2007
Springer
Abstract. Modern mobile phones and PDAs are equipped with positioning capabilities (e.g., GPS). Users can access public location-based services (e.g., Google Maps) and ask spatial ...
154
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SIGMOD
2011
ACM
14 years 7 months ago
2011
ACM
We demonstrate NetTrails, a declarative platform for maintaining and interactively querying network provenance in a distributed system. Network provenance describes the history an...
158
Voted
IJCAI
2003
15 years 6 months ago
2003
In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global i...