59 search results - page 10 / 12 » Rewriting Unions of General Conjunctive Queries Using Views |
SEMWEB
2009
Springer
13 years 11 months ago
2009
Springer
RDF Schema (RDFS) as a lightweight ontology language is gaining popularity and, consequently, tools for scalable RDFS inference and querying are needed. SPARQL has become recently ...
DOLAP
2000
ACM
13 years 9 months ago
2000
ACM
A multidimensional database can be seen as a collection of multidimensional cubes, from which information is usually extracted by aggregation; aggregated data can be calculated ei...
VLDB
1999
ACM
13 years 9 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
SEMWEB
2010
Springer
13 years 3 months ago
2010
Springer
Given the large number of Semantic Web Services that can be created from online sources by using existing annotation tools, expressive formalisms and efficient and scalable approac...
VLDB
1995
ACM
13 years 8 months ago
1995
ACM
We follow the stack-baaed approach to query languages which is a new formal and intellectual paradigm for integrating querying and programming for object-oriented databases. Queri...