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SEMWEB
2010
Springer
13 years 5 months ago
Using Reformulation Trees to Optimize Queries over Distributed Heterogeneous Sources
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...
Yingjie Li, Jeff Heflin
DEXAW
2007
IEEE
128views Database» more  DEXAW 2007»
13 years 11 months ago
Sharing Data on the Grid using Ontologies and distributed SPARQL Queries
The vision of the Semantic Web is to make Web content machine-readable. To describe data, the Resource Description Framework has been extended with a schema-level and description ...
Andreas Langegger, Martin Blöchl, Wolfram W&o...
IAT
2009
IEEE
13 years 5 months ago
Facilitating Active Multidimensional Association Mining with User Preference Ontology
Multidimensional association mining from data warehouse has become a knowledge discovery paradigm because it provides more specific conditional settings for target mining data, th...
Chin-Ang Wu, Wen-Yang Lin, Chuan-Chun Wu
BIBE
2008
IEEE
100views Bioinformatics» more  BIBE 2008»
14 years 2 months ago
Flexible data integration and ontology-based data access to medical records
— The ASSIST project aims to facilitate cervical cancer research by integrating medical records containing both phenotypic and genotypic data, and residing in different medical c...
Lucas Zamboulis, Alexandra Poulovassilis, George R...
TSC
2010
182views more  TSC 2010»
13 years 2 months ago
A Query Rewriting Approach for Web Service Composition
Data-Providing (DP) services allow query-like access to organizations' data via web services. The invocation of a DP service results in the execution of a query over data sour...
Mahmoud Barhamgi, Djamal Benslimane, Brahim Medjah...