Abstract. The Internet has catered for the transformation of traditional "stovepiped" service companies into global service networks fostering coproduction of value to more effectively and efficiently satisfy the evergrowing demands of mundane customers. The catalyst of this change is the happenstance of Service Oriented Computing, which provides a natural distributed computing technology paradigm for implementing and evolving such highly distributed networks of autonomous trading partners with coordinate and cooperative actions. However, how to faithfully (re-)map service networks to business processes and service realizations and vice-versa is still partly terra incognita. In this paper, we introduce a semi-automatic model transformation approach for creating the abstract business processes that take place between trading partners from models of service networks, assuming limited human-involvement focused on selecting reusable transformation patterns. This approach is explored and validated using a realistic case study reflecting best practices in the telecommunications industry.