Consistent Answers from Integrated XML Data

Authors:
Zijing Tan;Chengfei Liu;Wei Wang;Baile Shi
Affiliations:
School of Computer Science, Fudan University, Shanghai, China;Faculty of Information and Communication Technologies, Swinburne University of Technology, Australia;School of Computer Science, Fudan University, Shanghai, China;School of Computer Science, Fudan University, Shanghai, China
Venue:
DASFAA '09 Proceedings of the 14th International Conference on Database Systems for Advanced Applications
Year:
2009

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Abstract

We consider the problem of using query transformation to compute consistent answers when queries are posed to virtual XML data integration systems, which are specified following the local-as-view approach. This is achieved in two steps. First the given query is transformed to a new query with global constraints considered, then the new query is rewritten to queries on the underlying data sources by reversing rules in view definitions. The XPath query on the global system can be transformed in XQuery. We implement prototypes of our method, and evaluate our framework and algorithms in the experiment.