5221 search results - page 392 / 1045 » An On-line Problem Database |
250
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VLDB
2002
ACM
16 years 7 months ago
2002
ACM
We are interested in de ning and querying views in a huge and highly heterogeneous XML repository Web scale. In this context, view de nitions are very large and there is no appare...
300
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VLDB
2006
ACM
16 years 7 months ago
2006
ACM
We focus on the problem of efficient learning of dependency trees. Once grown, they can be used as a special case of a Bayesian network, for PDF approximation, and for many other u...
252
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VLDB
2007
ACM
16 years 7 months ago
2007
ACM
Evaluation of twig queries over probabilistic XML is investigated. Projection is allowed and, in particular, a query may be Boolean. It is shown that for a well-known model of pro...
256
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VLDB
2007
ACM
16 years 7 months ago
2007
ACM
When integrating data from heterogeneous sources, it is often necessary to transform both the schemas and the data from the underlying sources in order to present the integrated d...
257
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VLDB
2007
ACM
16 years 7 months ago
2007
ACM
Ontology, an explicit specification of shared conceptualization, has been increasingly used to define formal data semantics and improve data reusability and interoperability in en...