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Today, there are many different formalisms and notations for modelling business processes. Though most of the formalisms have their justification, the plethora of notations makes it hard to compare and to exchange business process models among different tools. AMFIBIA (A Meta-model For the Integration of BusIness process modelling Aspects) sets out to capture the basic aspects of business process models and to define their concepts independently from a particular formalism and notation, and then map different formalisms to these basic concepts. This way, business process models can be compared with each other, and it will be even possible, to integrate and combine different formalisms in a single workflow engine. Currently, we implement a prototype of a workflow engine, which supports the concepts of AMFIBIA. Since the development of AMFIBIA started quite late in the history of workflow management, it might not have strong impact on existing workflow management systems. The concepts of AMFIBIA, however, should be applicable to SOA, were formalism independence is even more important. The talk presents the ideas and concepts of AMFIBIA and intends to trigger a discussion on the aspects of SOA and the aspects and concepts that need to me captured in SOA.