Integration of autonomous object-oriented systems requires the integration of object structure and object behavior. Past research in the integration of autonomous object-oriented systems has so far mainly addressed integration of object structure. During our research we have identified business process correspondences and have given proper integration operators. So far these integration operators are suited for creating generalized models but not for creating or dealing with the composition of business processes. In this paper we propose integration operators which are able to create, deal, and finalize composition between them. For modeling purposes we use the Unified Modeling Language (UML), especially activity diagrams.