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This paper describes an approach for the definition and storage of workflow in test data analysis, with specific emphasis on automotive testing in research and development. As data analysis in this context does not follow one single general procedure, Petri nets have been chosen as a formal approach to define any individual workflow processes. ASAM ODS is a standard for the storing large amounts of measured/processed data together with descriptive information; it provides a well-suited platform for archiving the related workflow definitions as well. This paper shortly introduces both technologies and describes how Petri net based workflow definitions can be stored in an ASAM ODS environment together with the data themselves. Knowing about the workflow finally allows to trace how specific results have been produced.