Schema Evolution in Federated Information Systems

Busse, Susanne; Pons, Claudia
Proc. BTW 2001

Mediators – used in federated information systems – provide a homogeneous read-only
access to a set of autonomous information sources. To achieve semantic integration of the
heterogeneous data, correspondences between the autonomous schemas are specified
manually by experts. Considering the continuous evolution of those typically long-living
information systems, schema evolution is an important aspect. New concepts are necessary to adapt correspondences consistently to evolving schemas.
In this paper we propose a formalized schema evolution mechanism for federated information

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