5130 search results - page 47 / 1026 » Constraint Query Languages |
ICDT
2012
ACM
12 years 1 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
CIKM
2011
Springer
12 years 11 months ago
2011
Springer
In this paper, we reveal a common deficiency of the current retrieval models: the component of term frequency (TF) normalization by document length is not lower-bounded properly;...
ICLP
2009
Springer
14 years 11 months ago
2009
Springer
Abstract. Qualification has been recently introduced as a generalization of uncertainty in the field of Logic Programming. In this paper we investigate a more expressive language f...
CIKM
2008
Springer
14 years 28 days ago
2008
Springer
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for ag...
RWEB
2005
Springer
14 years 4 months ago
2005
Springer
A number of techniques have been developed to facilitate powerful data retrieval on the Web and Semantic Web. Three categories of Web query languages can be distinguished, accordin...