6740 search results - page 148 / 1348 » Querying Databases with Taxonomies |
152
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ICDT
2007
ACM
16 years 20 days ago
2007
ACM
Moving objects produce trajectories. We describe a data model for trajectories and trajectory samples and an efficient way of modeling uncertainty via beads for trajectory samples....
190
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ADC
2006
Springer
16 years 15 days ago
2006
Springer
Query answering over OWLs and RDFs on the Semantic Web is, in general, a deductive process. To this end, OWL, a family of web ontology languages based on description logic, has be...
165
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ICDT
2003
ACM
15 years 11 months ago
2003
ACM
We study extensions of first-order logic over the reals with different types of transitive-closure operators as query languages for constraint databases that can be described by...
171
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COOPIS
2004
IEEE
15 years 10 months ago
2004
IEEE
Abstract. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirement...
180
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FUIN
2002
15 years 6 months ago
2002
Abstract. In the paper we deal with the problem of modeling and querying information in schemaless databases of partially labeled objects (PLO-DB). Partially labeled objects are us...