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Formalization of Federated Schema Architectural Style Variability

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DOI: 10.4236/jsea.2015.82009    2,153 Downloads   2,552 Views   Citations


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 the architecture of federated database systems. It is shown how the variability of specific architectures can be compared to the reference architecture and to each other. To achieve this, we combine the semi-formal object-oriented modeling language UML with the formal object-oriented specification language Object-Z. Appropriate use of inheritance in the formal specification, as enabled by Object-Z, greatly supports specifying and analyzing the variability among the studied schema architectures. The investigation also serves to illustrate the employed specification techniques for analyzing and comparing software architecture specifications.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Hasselbring, W. (2015) Formalization of Federated Schema Architectural Style Variability. Journal of Software Engineering and Applications, 8, 72-92. doi: 10.4236/jsea.2015.82009.


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