376 search results - page 4 / 76 » On the semantics and evaluation of top-k queries in probabil... |
PODS
2007
ACM
14 years 7 months ago
2007
ACM
We show that relational algebra calculations for incomplete databases, probabilistic databases, bag semantics and whyprovenance are particular cases of the same general algorithms...
VLDB
2007
ACM
14 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...
IDEAS
2007
IEEE
14 years 1 months ago
2007
IEEE
There is an increasing need for an XML query engine that not only searches for exact matches to a query but also returns “query-like” structures. We have designed and develope...
VLDB
2004
ACM
14 years 9 days ago
2004
ACM
EDBT
2009
ACM
14 years 1 months ago
2009
ACM
There has been an explosion of hyperlinked data in many domains, e.g., the biological Web. Expressive query languages and effective ranking techniques are required to convert this...