Proceedings of the Symposium on Principles of Database Systems (PODS) (2002)
Data integration is the problem of combining data residing at different sources, and providing the user with a unified view of these data. The problem of designing data integra- tion systems is important in current real world applications, and is characterized by a number of issues that are interest- ing from a theoretical point of view. This document presents on overview of the material to be presented in a tutorial on data integration. The tutorial is focused on some of the the- oretical issues that are relevant for data integration. Special attention will be devoted to the following aspects: modeling a data integration application, processing queries in data integration, dealing with inconsistent data sources, and rea- soning on queries.
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