137 search results - page 19 / 28 » Query optimization for ontology-based information integratio... |
83
Voted
ATMOS
2008
15 years 18 days ago
2008
Abstract. The search for train connections in state-of-the-art commercial timetable information systems is based on a static schedule. Unfortunately, public transportation systems ...
164
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SIGMOD
2008
ACM
15 years 11 months ago
2008
ACM
Mobile devices equipped with positioning capabilities (e.g., GPS) can ask location-dependent queries to Location Based Services (LBS). To protect privacy, the user location must n...
100
Voted
ADL
2000
Springer
15 years 3 months ago
2000
Springer
The goal of this work is to improve the accuracy (precision and recall) and communication effectiveness of a database system response to a user information request, by utilizing a...
SEMWEB
2007
Springer
15 years 5 months ago
2007
Springer
Abstract. There is a growing discrepancy between the creation of digital content and its actual employment and usefulness in a learning society. Technologies for recording lectures...
WWW
2001
ACM
15 years 11 months ago
2001
ACM
Integrity constraints are an essential part of a modern schema definition language. They are useful for semantic specification, update consistency control, query optimization, inf...