Abstract. AMFIBIA is a meta-model that formalizes the essential aspects and concepts of business process modelling. Though AMFIBIA is not the first approach to formalizing the aspects and concepts of business process modelling, it is more ambitious in the following respects: First, it is independent from particular modelling formalisms of business processes and it is designed in such a way that any formalisms for modelling some aspect of a business process can be plugged into AMFIBIA. Therefore, AMFIBIA is formalism-independent. Second it is not biased toward any aspect of business process and the different aspects can be, basically, considered and modelled independently of each other. Moreover, it is not restricted to a fixed set of aspects; further aspects of business processes can be easily integrated. Third, AMFIBIA does not only name and relate the concepts of business process modelling, as it is typically done in ontologies or architectures for business process modelling. Rather,...