Data processing in data intensive scientific fields likebioinformatics is automated to a great extent. Among others,automation is achieved with workflow engines that execute anexplicitly stated sequence of computations. Scientists can usethese workflows through science gateways or they develop themby their own. In both cases they may have to preprocess their raw data and also may want to further process the workflowoutput. The scientist has to take care about provenance of thewhole data processing pipeline. This is not a trivial task dueto the diverse set of computational tools and environments usedduring the transformation of raw data to the final results. Thuswe created a metadata schema to provide provenance for dataprocessing pipelines and implemented a tool that creates this metadata during the execution of typical scientific computations.