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C. Hentrich, U. Zdun:
"Patterns for Business Object Model Integration in Process-Driven and Service-Oriented Architectures";
Talk: Conference on Pattern Languages of Programs PLoP 2006, Portland, Oregon, USA; 10-21-2006 - 10-23-2006; in: "Proceedings of the Conference on Pattern Languages of Programs PLoP 2006", ACM, (2006), ISBN: 978-1-60558-372-3; Paper ID 23, 14 pages.

Service-oriented architectures often have the goal to integrate
various systems of one or more organizations in a flexible way to
be able to quickly react on business changes. Integration based
only on services, however, falls short in reaching this goal
because the application-specific business object models of
multiple external systems (especially legacy systems) need to be
integrated into the service-oriented system. When multiple
business object models must be integrated into one system,
serious data integration issues might arise. Examples of such
problems are incompatible data definitions, inconsistent data
across the enterprise, data redundancy, and update anomalies. We
present patterns that address these issues and describe how to
integrate the application-specific business object models of
various external systems into a consistent process-driven and
service-oriented architecture.