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AProMoRe is implemented via a three-layered service oriented architecture and deployed over the internet (see Fig. 1). The Enterprise layer hosts the Manager—a public enterprise service which exposes all the repository features via Web service operations for integration with thirdparty applications, eg a BPM System. Moreover, these operations can be accessed via a Web Portal, which in turn delegates model editing functionality to Oryx (http://bpt. hpi. uni-potsdam. de/Oryx/WebHome). Other editors may be integrated, such as YAWL 1, etc. The Intermediary layer hosts the Canonizer which is an adapter responsible for (de-) canonizing process models as they are imported/exported into/from the repository. The Toolbox is a façade over the advanced operations that can be performed on the stored process model collections. Access to these models is achieved via the Data access service in the Basic layer, which …