265 search results - page 36 / 53 » Logical Queries over Views: Decidability and Expressiveness |
ICPR
2002
IEEE
15 years 11 months ago
2002
IEEE
This paper proposes a novel view of the information generated by relevance feedback. Latent semantic analysis is adapted to this view to extract useful inter-query information. Th...
CCGRID
2006
IEEE
15 years 4 months ago
2006
IEEE
We have architected and evaluated a new kind of data resource, one that is composed of a logical collection of ephemeral data streams that could be viewed as a collection of publi...
PVLDB
2010
14 years 8 months ago
2010
Ontology-based data access is a powerful form of extending database technology, where a classical extensional database (EDB) is enhanced by an ontology that generates new intensio...
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PODS
2009
ACM
15 years 10 months ago
2009
ACM
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
ESOP
2003
Springer
15 years 3 months ago
2003
Springer
Abstract. This paper concerns mechanisms for maintaining the value of an instrumentation predicate (a.k.a. derived predicate or view), defined via a logical formula over core pred...