Partnerübergreifende Geschäftsprozesse und ihre Realisierung in BPEL

The focus of this work is set on business processes spanning across multiple business partners. Such business processes are called choreographies. This work presents the method CREAM which allows modeling choreographies. In contrast to choreographies, orchestrations denote executable business processes of one organization, which use services to realize a business goal. A variation of CREAM enables obtaining a choreography by splitting an existing orchestration. Thereby, the implicit data dependencies being internal to the orchestration are transformed into messages exchanged between partners. To enable that transformation, the explicit data flow of the orchestration is required. The Web Services Business Process Execution Language (BPEL) is a widely-used modeling language for modeling business processes. It supports implicit modeling of data flow only. Therefore, an approach is required to determine the explicit data flow. In this work, such an approach to determine the explicit data flow in BPEL processes is presented. A choreography language is required to enable modeling of choreographies. For choosing a suitable language, this work presents possible criteria to compare choreography languages and evaluates existing choreography languages in the area of Web services. As no evaluated language fulfills all requirements, this work presents the choreography language BPEL4Chor,