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Data Integration With Dependent Sources

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Executive Summary

Data integration systems offer users a uniform interface to a set of data sources. Previous work has typically assumed that the data sources are independent of each other; however, in scenarios involving large numbers of sources, such as the web or large enterprises, there is an eco-system of dependent sources, where some sources copy parts of their data from others. This paper considers the new optimization problems that arise while answering queries over large number of dependent sources.

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