3269 search results - page 472 / 654 » Query Optimization for XML |
211
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PVLDB
2008
15 years 4 months ago
2008
Keyword search on graph structured data has attracted a lot of attention in recent years. Graphs are a natural "lowest common denominator" representation which can combi...
195
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JAPLL
2010
15 years 4 months ago
2010
We provide complete axiomatizations for several fragments of XPath: sets of equivalences from which every other valid equivalence is derivable. Specifically, we axiomatize downwar...
224
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IHI
2010
15 years 1 months ago
2010
The rising cost of healthcare is one of the major concerns faced by the nation. One way to lower healthcare costs and provide better quality care to patients is through the effect...
280
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ICDE
2005
IEEE
16 years 7 months ago
2005
IEEE
Given a region qR and a future timestamp qT, a "range aggregate" query estimates the number of objects expected to appear in qR at time qT. Currently the only methods fo...
279
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ICDE
2000
IEEE
16 years 7 months ago
2000
IEEE
Optimizing queries that involve operations on spatial data requires estimating the selectivity and cost of these operations. In this paper, we focus on estimating the cost of spat...