1268 search results - page 117 / 254 » On database query languages for K-relations |
WISE
2000
Springer
14 years 8 days ago
2000
Springer
The mediator/wrapper approach is used to integrate data from different databases and other data sources by introducing a middleware virtual database that provides high level abstr...
MTSR
2007
Springer
14 years 2 months ago
2007
Springer
In this paper we describe the development of an ontology of molecular and phenotypic cereals data, realized by integrating existing public web databases with the database developed...
DOCENG
2004
ACM
14 years 1 months ago
2004
ACM
With the wide adoption of XML as a standard data representation and exchange format, querying XML documents becomes increasingly important. However, relational database systems co...
GVD
2004
13 years 9 months ago
2004
MIWeb realizes a mediator-based integration of heterogeneous metadata sources over the Web. Mediators are well known from database integration. They improve the quality of search ...
FOCS
1998
IEEE
14 years 5 days ago
1998
IEEE
This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis [1981], this problem is solvable in polynom...