Design time and runtime models may be uniformly described by UML and OCL models connected through correspondence models. We propose to develop a common user interface for both model layers in order to provide systematic and uniform access through operation calls to design time and runtime items. Operation calls can be systematically recorded in filmstrip models so that complete design time and runtime development steps are accessible. From recorded steps, various standard software models (like

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... lass, object and sequence diagrams) may be derived for documentation and comprehension purposes.