Filling the gap between data federation and data integration.
Antonella Poggi, Marco Ruzzi · 2004
Abstract. Today’s fast and continuous growth of large business organizations enforces the need to integrate and share data coming from a number of heteroge-neous and distributed data sources. To solve this kind of problem, data federation tools suggest the adoption of a database management system as a kind of mid-dleware infrastructure that uses a set of wrappers to access heterogeneous data sources. In this paper, we highlight federation tools limitations with respect to the information integration problem and show how data integration systems over-come such limitations. We propose then two different techniques to implement a data integration system using a data federation tool. Finally, we present experi-mental results that compare the two solutions. 1