Choreographies as Federations of Choreographies and Orchestrations
We propose a new conceptual model for choreographies of web-services. Choreographies are seen as virtual workflow models shared among participants. Subsets of these participants might have more refined models known only to them. So we see choreographies actually as federations of process models (choreographies as well as orchestrations). In this paper we discuss this layered concept, and present a metamodel with the following distinguishing features: It is fully distributed and does not require a central or global authority. It captures the control flow and the data flow aspects of the processes. Choreography models can be (re)used in several other choreographies. Additionally, we provide a procedure which checks whether choreographies fit together, i.e. the conformance of the federation relationship between models.
KeywordsComplex Activity Activity Step Control Step Control Node Executable Process
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- 1.van der Aalst, W.M.P., Basten, T.: Inheritance of workflows: an approach to tackling problems related to change. Theor. Comput. Sci. 270(1-2) (2002)Google Scholar
- 2.van der Aalst, W., van Hee, K.: Workflow Management: Models, Methods, and Systems. MIT press, Cambridge (2002)Google Scholar
- 3.Andrews, T., et al.: Business process execution language for web services (bpel4ws). ver. 1.1, BEA, IBM, Microsoft, SAP, Siebel Systems (2003)Google Scholar
- 5.Basten, T.: In Terms of Nets: System Design with Petri Nets and Process Algebra. PhD thesis, TU Eindhoven (1998)Google Scholar
- 7.Arkin, A., et al.: Web service choreography interface (wsci) 1.0. W3C (2002)Google Scholar
- 8.Kavantzas, N., et al.: Web services choreography description language (ws-cdl) 1.0. W3C (2004)Google Scholar
- 9.Lehmann, M.: Data Access in Workflow Management Systems. Number 94 in DISDBIS. Akademische Verlagsgesellschaft Aka GmbH, Berlin (2006)Google Scholar
- 11.Peltz, C.: Web services orchestration and choreography. IEEE Computer 36(10), 46–52 (2003)Google Scholar