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# Description of the different data types comprised in interoperable information system as well as their relationships. This is also called the '''static''' part, or the ''structure'' of the architecture. It tells organizations which information elements (e.g. descriptions of messages, exchange sequences, roles and services) they have to provide to collaboration partners and how they can optimally correlate these to internal elements.
# Description of different building paths for implementing or adjusting interoperable information systems. This is also called the '''dynamic''' part of the architecture. It tells organization, how to iteratively develop the elements mentioned above.
# Concept for the technical '''components needed to
One element comprised in the third category is a '''"BII-repository"''', in which each organization publishes the content of its [[Business Interoperability Interface]] (BII) to collaboration partners. Since it comprises external views on information system elements, it provides publishing and discovery functionalities as needed in [[service-oriented architecture]]: In the BII, the externally relevant processes, services, organization structures etc. are described on various levels of technical granularity, enabling other organizations to search also for business-level elements and not only for technical artifacts. Here, different from the traditional SOA approach, instead of one central service directory, various partner-specific repositories are implemented.
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