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[[File:Architecture of Interoperable Information Systems.gif|thumb|right|Architecture of Interoperable Information Systems]]
The '''Architecture of Interoperable Information Systems (AIOS)''' is a reference architecture for the development of interoperable [[enterprise information systems]]. If enterprises or public administrations want to engage in automated business processes with other organizations, their IT systems must be able to work together, i.e. they need to be [[interoperability|interoperable]]. The AIOS represents a generic building plan for these organizations to develop interoperable information systems by systematically adjusting and extending their internal information systems.
The AIOS was described in a doctoral thesis and is based on the results of various research projects on interoperability.<ref>Ziemann (2010): [http://www.logos-verlag.de/cgi-bin/buch/isbn/2414 Architecture of Interoperable Information Systems - An enterprise Model-based Approach for Describing and Enacting Collaborative Business Processes.] Logos, 2010. The thesis is summarized here: Ziemann (2012): Architecture of Interoperable Information Systems - Reference Architecture for Collaborations between Public Administrations. In: Krallmann, H., Zapp, A. (Eds.): Bausteine einer vernetzten Verwaltung. Berlin, Erich Schmidt Verlag, 2012, pp. 165.</ref> It is independent from specific products or vendors but describes generically the different layers, views, relationships and technical means needed to efficiently establish interoperable information systems. To this aim it combines concepts from [[Service-oriented Architecture]], Collaborative Business and [[Business Process Modelling]]. It can be seen as complementary to [[Architecture of Integrated Information Systems|ARIS]], a well-known architecture for internal information systems and business processes.
== Definition ==
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