2853 search results - page 124 / 571 » On the Efficiency of Provenance Queries |
193
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BNCOD
2009
15 years 7 months ago
2009
We study the expressiveness of a positive fragment of path queries, denoted Path+ , on node-labeled trees documents. The expressiveness of Path+ is studied from two angles. First, ...
190
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PODS
2004
ACM
16 years 6 months ago
2004
ACM
We present a novel coding-based technique for answering spatial and spatiotemporal queries on objects moving along a system of curves on the plane such as many road networks. We h...
252
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VLDB
2007
ACM
16 years 6 months ago
2007
ACM
Many aspects of the data integration problem have been considered in the literature: how to match schemas across different data sources, how to decide when different records refer...
164
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CAISE
2003
Springer
15 years 11 months ago
2003
Springer
While current search engines seem to easily handle the size of the data available on the Internet, they cannot provide fresh results. The most up-to-date data always resides on the...
188
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TPDS
2008
15 years 6 months ago
2008
Energy efficiency is one of the most critical issues in the design of wireless sensor networks. Observing that many sensor applications for object tracking can tolerate a certain d...