7576 search results - page 227 / 1516 » On Querying Ontologies and Databases |
295
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
Graphs are prevalently used to model the relationships between objects in various domains. With the increasing usage of graph databases, it has become more and more demanding to e...
159
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AVI
2000
15 years 8 months ago
2000
To support users in querying geographic databases we have developed a system that lets people sketch what they are looking for. It closes the gap between user and information syst...
292
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ICDE
2006
IEEE
16 years 8 months ago
2006
IEEE
Current approaches for answering queries with imprecise constraints require user-specific distance metrics and importance measures for attributes of interest - metrics that are ha...
154
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ICDT
2007
ACM
16 years 24 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....
170
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ICDT
2003
ACM
15 years 12 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...