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DEXA
2009
Springer
151views Database» more  DEXA 2009»
13 years 10 months ago
Automatic Extraction of Ontologies Wrapping Relational Data Sources
Describing relational data sources (i.e. databases) by means of ontologies constitutes the foundation of most of the semantic based approaches to data access and integration. In sp...
Lina Lubyte, Sergio Tessaris
SBBD
2004
128views Database» more  SBBD 2004»
13 years 5 months ago
Integrating Heterogeneous Data Sources in Flexible and Dynamic Environments
Flexible and dynamic environments are characterized by high independence from connection participants, low control over available services and high tolerance to communication fail...
Angelo Brayner, Marcelo Meirelles
SIGMOD
2004
ACM
163views Database» more  SIGMOD 2004»
14 years 3 months ago
Constraint-Based XML Query Rewriting For Data Integration
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
Cong Yu, Lucian Popa
WEBDB
1999
Springer
131views Database» more  WEBDB 1999»
13 years 7 months ago
Adapter Generation for Extracting and Querying Data from Web
Accessing and integrating data from heterogeneous sources has become a significant challenge. So-called adapters provide the functionality for translating SQL queries into querie...
Kai-Uwe Sattler, Michael Höding
DEBU
2000
118views more  DEBU 2000»
13 years 3 months ago
A Dynamic Query Processing Architecture for Data Integration Systems
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the mem...
Luc Bouganim, Françoise Fabret, C. Mohan, P...