412 search results - page 66 / 83 » Aggregate queries over ontologies |
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Abstract-- We present COLR-Tree, an abstraction layer designed to support efficient spatio-temporal queries on live data gathered from a large collection of sensors. We use COLR-Tr...
SIGMOD
2005
ACM
14 years 9 months ago
2005
ACM
One of the most common operations in analytic query processing is the application of an aggregate function to the result of a relational join. We describe an algorithm for computi...
IJCAI
2007
13 years 10 months ago
2007
Mechanism design is the study of preference aggregation protocols that work well in the face of self-interested agents. We present the first general-purpose techniques for automa...
SEMWEB
2009
Springer
14 years 3 months ago
2009
Springer
Abstract. Recently, the W3C Linking Open Data effort has boosted the publication and inter-linkage of large amounts of RDF datasets on the Semantic Web. Various ontologies and know...
CAISE
2003
Springer
14 years 2 months ago
2003
Springer
A federated Web-based multimedia information system on one hand gathers its data from various Web sources, on the other hand offers the end-user a rich semantics describing its co...