104 search results - page 4 / 21 » Querying Mediated Geographic Data Sources |
SIGMOD
1999
ACM
13 years 11 months ago
1999
ACM
Existing data-integration systems based on the mediation architecture employ a variety of mechanisms to describe the query-processing capabilities ofsources. However, these system...
WISE
2000
Springer
13 years 12 months 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...
ER
1999
Springer
13 years 11 months ago
1999
Springer
Several federated database systems have been built in the past using the relational or the object model as federating model. This paper gives an overview of the XMLMedia system, a ...
GIS
2005
ACM
14 years 8 months ago
2005
ACM
Several application contexts require the ability to use together and compare different geographic datasets (maps) concerning the same or overlapping areas. This is for example the...
ICDE
2001
IEEE
14 years 9 months ago
2001
IEEE
We propose an extension to current view-based mediator systems called model-based mediation, in which views are defined and executed at the level of conceptual models (CMs) rather...