Abstract. Introducing process orientation to overcome the functionaloriented organizational structure was the main concern within enterprises during the last decade to improve process quality. The next wave of process-oriented enterprises deals with integrating private tasks and processes into cross-organizational business processes characterized by high automation effort and supported by a wide penetration of e-Business technologies. In this work, we propose a concept for transforming internal private processes to publicly visible processes in a semi-automatic way. This transformation will be done by hiding the modelling complexity from the users. Evaluated on the basis of Event-Driven Process Chains (EPC) for private process view and the Business Process Modelling Notation (BPMN) for public process view, this article identifies the challenges both on semantic and syntactic level regarding the integrated mapping between different modelling layers as well as modelling languages. Key...