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Clinical studies are often conducted as multi-centered studies involving participants at different locations. Thus it becomes obvious that using mobile platforms and remote data entry is beneficial for such studies. When working in a distributed fashion, data exchange standards are required. Bringing these standards to the end user also requires incorporating user interface issues. Considering various device types, from desktop computer to small handheld devices raises the question how user interfaces could be derived from the data exchange standards. In this paper we consider CDISC's operational data model as a data standard and discuss its relevance in the user interface generation process. Several candidate description languages are explored and embedded into a general transformation process emphasizing especially small and mobile device characteristics.