Towards Executing ebBP-Reg B2Bi Choreographies

Applying choreography and orchestration technology to Business-to-Business integration (B2Bi) scenarios has become a popular technique for very good reasons. Choreography descriptions can be used to capture B2Biscenarios from a global and abstract perspective while orchestrations then can be used to specify the local implementation of each integration partner. ebXML BPSS(ebBP) is a prominent B2Bi choreography standard with very helpful domain-specific concepts, but clear guidelines for creating executable choreographies are missing. In order to create ebBP models that are both adequateand executable, expressiveness, comprehensibility and standard-conformance have to be weighed up. In this paper, we introduce ebBP-Reg as an ebBP modeling flavor that is designed such that ebBP-Reg choreographies are executable as WS-BPEL orchestrations. At the same time, ebBP-Reg models strictly conform to the ebBP standard and support concurrency and decomposition. We characterize syntactic validity of ebBP-Reg models by means of language production rules and show how instances of ebBP-Reg can be implemented using WS-BPEL.