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» Answering XML Queries over Heterogeneous Data Sources
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ER
2009
Springer
117views Database» more  ER 2009»
14 years 1 months ago
An Ontology-Based Framework for Geographic Data Integration
Ontologies have been extensively used to model domain-specific knowledge. Recent research has applied ontologies to enhance the discovery and retrieval of geographic data in Spatia...
Vânia Maria Ponte Vidal, Eveline R. Sacramen...
OTM
2005
Springer
14 years 3 months ago
Optimization of Distributed Queries in Grid Via Caching
Abstract. Caching can highly improve performance of query processing in distributed databases. In this paper we show how this technique can be used in grid architecture where data ...
Piotr Cybula, Hanna Kozankiewicz, Krzysztof Stence...
GIS
2002
ACM
13 years 9 months ago
A WFS-based mediation system for GIS interoperability
The proliferation of spatial data on the Internet is beginning to allow a much wider access to data currently available in various Geographic Information Systems (GIS). In order t...
Omar Boucelma, Mehdi Essid, Zoé Lacroix
PVLDB
2008
110views more  PVLDB 2008»
13 years 9 months ago
DObjects: enabling distributed data services for metacomputing platforms
Many applications rely heavily on large amounts of data in the distributed storages collected over time or produced by large scale scientific experiments or simulations. The key co...
Pawel Jurczyk, Li Xiong
PODS
2005
ACM
211views Database» more  PODS 2005»
14 years 10 months ago
Join-distinct aggregate estimation over update streams
There is growing interest in algorithms for processing and querying continuous data streams (i.e., data that is seen only once in a fixed order) with limited memory resources. Pro...
Sumit Ganguly, Minos N. Garofalakis, Amit Kumar, R...