137 search results - page 4 / 28 » Query optimization for ontology-based information integratio... |
CIKM
2010
Springer
13 years 3 months ago
2010
Springer
In recent years, there has been an explosion of publicly available RDF and OWL data sources. In order to effectively and quickly answer queries in such an environment, we present...
ICDE
2005
IEEE
13 years 11 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
CIKM
2001
Springer
13 years 9 months ago
2001
Springer
Existing approaches for optimizing queries in data integration use decoupled strategies–attempting to optimize coverage and cost in two separate phases. Since sources tend to ha...
COMAD
2009
13 years 6 months ago
2009
The problem of information integration is discussed in the context of answering a query over the web. Querying the web requires that information from different web and other sourc...
DEBU
2002
13 years 5 months ago
2002
An increasing number of business users and software applications need to process information that is accessible via multiple diverse information systems, such as database systems,...