710 search results - page 86 / 142 » Relational Expressive Power of Constraint Query Languages |
SIGMOD
1999
ACM
14 years 2 days ago
1999
ACM
Systems for managing and querying semistructured-data sources often store data in proprietary object repositories or in a tagged-text format. We describe a technique that can use ...
ICLP
2004
Springer
14 years 1 months ago
2004
Springer
The extended answer set semantics for logic programs allows for the defeat of rules to resolve contradictions. We propose a refinement of these semantics based on a preference rel...
BTW
2003
Springer
14 years 1 months ago
2003
Springer
Abstract:The W3C XML Linking Language (XLink) provides a powerful means for interlinking XML documents all over the world. While the effects when browsing through linked XML docume...
EDBT
2012
ACM
11 years 10 months ago
2012
ACM
We present an effective optimization framework for general SQLlike map-reduce queries, which is based on a novel query algebra and uses a small number of higher-order physical ope...
CIKM
2009
Springer
14 years 2 months ago
2009
Springer
XML query languages use directional path expressions to locate data in an XML data collection. They are tightly coupled to the structure of a data collection, and can fail when ev...