736 search results - page 46 / 148 » Answering Imprecise Queries over Web Databases |
SSD
2007
Springer
14 years 1 months ago
2007
Springer
An uncertain geo-spatial dataset is a collection of geo-spatial objects that do not represent accurately real-world entities. Each object has a confidence value indicating how lik...
VLDB
2001
ACM
14 years 4 days ago
2001
ACM
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
SEMWEB
2009
Springer
14 years 7 days ago
2009
Springer
Abstract—For many tasks, such as the integration of knowledge bases in the semantic web, one must not only handle the knowledge itself, but also characterizations of this knowled...
TKDE
2010
13 years 6 months ago
2010
—Recently, many new applications, such as sensor data monitoring and mobile device tracking, raise up the issue of uncertain data management. Compared to “certain” data, the ...
ODBIS
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. RDF Schema (RDFS) extends RDF with a schema vocabulary with a predefined semantics. Evaluating queries which involve this vocabulary is challenging, and there is not yet...