3456 search results - page 255 / 692 » Semantics in Spatial Databases |
294
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GIS
2004
ACM
16 years 7 months ago
2004
ACM
Spatial, temporal and spatio-temporal aggregates over continuous streams of remotely sensed image data build a fundamental operation in many applications in the environmental scie...
312
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GIS
2006
ACM
16 years 7 months ago
2006
ACM
If you were told that some object A was perfectly (or somewhat, or not at all) in some direction (e.g., west, above-right) of some reference object B, where in space would you loo...
267
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...
190
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ER
2006
Springer
15 years 10 months ago
2006
Springer
Abstract. The notion of user preference in database modeling has recently received much attention in advanced applications, such as personalization of e-services, since it captures...
170
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CIKM
2005
Springer
16 years 5 days ago
2005
Springer
A framework for describing semantic relationships among nodes in XML documents is presented. In contrast to earlier work, the XML documents may have ID references (i.e., they corr...