Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=54095#.VO14DSzQrzE Author(s) Wilhelm Hasselbring Affiliation(s) Software Engineering Group, Department of Computer Science, Kiel University, Kiel, Germany . ABSTRACT Data integration requires managing heterogeneous schema information. A federated database system integrates heterogeneous, autonomous database systems on the schema level, whereby both local applications and global applications accessing multiple component database systems are supported. Such a federated database system is a complex system of systems which requires a well-designed organization at the system and software architecture level. A specific challenge that federated database systems face is the organization of schemas into a schema architecture. This paper provides a detailed, formal investigation of variability in the family of schema architectures, which are central components in ...
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