96 search results - page 9 / 20 » Complexity of the Stable Model Semantics for Queries on Inco... |
145
Voted
ER
2005
Springer
15 years 9 months ago
2005
Springer
Query rewriting is a fundamental task in query optimization and data integration. With the advent of the web, there has been renewed interest in data integration, where data is dis...
113
Voted
VLDB
1989
ACM
15 years 7 months ago
1989
ACM
An important direction in database research for non-standard applications (e.g. engineering or design applications) deals with adequate support for complex objects. Without doubt,...
130
Voted
DOOD
1995
Springer
15 years 7 months ago
1995
Springer
Abstract. Semistructured data has no absolute schema xed in advance and its structure may be irregular or incomplete. Such data commonly arises in sources that do not impose a rigi...
137
Voted
PODS
2008
ACM
16 years 3 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...
120
Voted
ESWS
2008
Springer
15 years 5 months ago
2008
Springer
The goal of this paper is to give an overview of the basics of the theory of RDF databases. We provide a formal definition of RDF that includes the features that distinguish this m...