49 search results - page 2 / 10 » Semantic query optimization in the presence of types |
ICDT
2012
ACM
11 years 7 months ago
2012
ACM
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
WWW
2006
ACM
14 years 6 months ago
2006
ACM
An important issue arising from Peer-to-Peer applications is how to accurately and efficiently retrieve a set of K best matching data objects from different sources while minimizi...
SDB
1995
13 years 8 months ago
1995
Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
TREC
2001
13 years 6 months ago
2001
PiQASso is a Question Answering system based on a combination of modern IR techniques and a series of semantic filters for selecting paragraphs containing a justifiable answer. Se...
VLDB
2005
ACM
13 years 10 months ago
2005
ACM
XML and XQuery semantics are very sensitive to the order of the produced output. Although pattern-tree based algebraic approaches are becoming more and more popular for evaluating...