6974 search results - page 259 / 1395 » Querying Semi-Structured Data |
153
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GEOINFO
2007
15 years 8 months ago
2007
In this paper we are interested in storing and perform OLAP queries about various aggregate trajectory properties. We consider a data stream environment where a set of mobile objec...
155
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VLDB
1991
ACM
15 years 10 months ago
1991
ACM
The development of a distributed database systemrequires effective solutions to many complex and interrelated design problems. The cost dependenciesbetween query optimization and ...
267
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
We study the problem of incrementally maintaining an XPath query on an XML database under updates. The updates we consider are node insertion, node deletion, and node relabeling. ...
172
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MDM
2007
Springer
16 years 23 days ago
2007
Springer
This demonstration presents iPDA, a system to support privacy-preserving data access in location-based mobile services. The iPDA system consists of three main components: 1) a mob...
175
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SODA
2001
ACM
15 years 8 months ago
2001
ACM
Point location is the problem of preprocessing a planar polygonal subdivision S into a data structure in order to determine efficiently the cell of the subdivision that contains a...