An adaptive query execution system for data integration
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
XML-based information mediation with MIX
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
XML Declarative Description: A Language for the Semantic Web
IEEE Intelligent Systems
Towards a Foundation for XML Document Databases
EC-WEB '00 Proceedings of the First International Conference on Electronic Commerce and Web Technologies
Query Formulation and Evaluation of XML Databases
WITASI '02 Proceedings of the IFIP TC6/WG6.4 Workshop on Internet Technologies, Applications and Social Impact
A Semantic Approach to XML-based Data Integration
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
A data model for XML databases
Journal of Intelligent Information Systems - Special issue on web intelligence
A bottom-up algorithm for query decomposition
International Journal of Innovative Computing and Applications
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Query decomposition is one of the most important phases of query processing in an integrated database system. A global query is decomposed into several sub-queries conforming to local formats, which can be used to extract data from distributed databases. In this paper a new query decomposition methodology for integrated XML databases is introduced. A special construction of mappings is also introduced, which provides information for query decomposition while efficiently avoiding data redundancy. Based on a set of given mappings, a global query is simultaneously decomposed into n sub-queries in one step, thus reducing time complexity. XML Declarative Description (XDD) – an extensible XML language incorporating a new variable class – provides the means to model as well as build the algorithms for the proposed system.