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Abstract: Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema. Given a source instance, there may be many solutions -- target instances that satisfy the constraints of the data exchange problem. Previous work has identified two classes of desirable solutions: canonical universal solutions, and their cores. Query answering in data exchange amounts to rewriting a query over the target schema to another query that, over a materialized... (Update)
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BibTeX entry: (Update)
M. Arenas, P. Barcelo, R. Fagin, L. Libkin. Locally consistent transformations and query answering in data exchange. In PODS 2004, pages 229--240. http://citeseer.ist.psu.edu/article/arenas04locally.html More
@inproceedings{ arenas04locally,
author = "M. Arenas and P. Barcelo and R. Fagin and L. Libkin",
title = "Locally consistent transformations and query answering in data exchange",
booktitle = "PODS 2004",
pages = "229--240",
year = "2004",
url = "citeseer.ist.psu.edu/article/arenas04locally.html" }
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