Database management systems
Principles of distributed database systems (2nd ed.)
Principles of distributed database systems (2nd ed.)
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Heterogeneous database integration in biomedicine
Computers and Biomedical Research
Scaling Access to Heterogeneous Data Sources with DISCO
IEEE Transactions on Knowledge and Data Engineering
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
An agent- and ontology-based system for integrating public gene, protein, and disease databases
Journal of Biomedical Informatics
Modeling and querying provenance by extending CIDOC CRM
Distributed and Parallel Databases
Indexing source descriptions based on defined classes
Proceedings of the Fourteenth International Database Engineering & Applications Symposium
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The exponential growth of the web and the extended use of database management systems in widely distributed information systems has brought to the fore the need for seamless interconnection of diverse and large numbers of information sources. Our contribution is a system that provides a flexible approach for integrating and transparently querying multiple data sources, using a reference ontology. Global semantic queries are automatically mapped to queries local to the participating sources. The query system is capable of handling complex join constructs and of choosing the appropriate attributes, relations, and join conditions to preserve user query semantics. Moreover, the query engine exploits information on horizontal, vertical, and hybrid fragmentation of database tables, distributed over the various data sources. This optimization improves system's recall and boosts its effectiveness and performance.