964 search results - page 125 / 193 » Efficiently Ordering Query Plans for Data Integration |
245
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VLDB
2007
ACM
16 years 4 months ago
2007
ACM
The modeling of high level semantic events from low level sensor signals is important in order to understand distributed phenomena. For such content-modeling purposes, transformat...
138
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SIGMOD
1997
ACM
15 years 8 months ago
1997
ACM
: The read-mostly environment of data warehousing makes it possible to use more complex indexes to speed up queries than in situations where concurrent updatesare present. The curr...
150
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WWW
2005
ACM
16 years 5 months ago
2005
ACM
Some recent initiatives try to take profit from RDF to make XML documents interoperate at the semantic level. Ontologies are used to establish semantic connections among XML langu...
163
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CCS
2008
ACM
15 years 6 months ago
2008
ACM
Hash tables are fundamental data structures that optimally answer membership queries. Suppose a client stores n elements in a hash table that is outsourced at a remote server so t...
157
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SIGMOD
2003
ACM
16 years 4 months ago
2003
ACM
The skyline of a set of d-dimensional points contains the points that are not dominated by any other point on all dimensions. Skyline computation has recently received considerabl...