The use model is modeled using the Useware Markup Language, useML (Reuther, 2003) within a model based development environment.
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Therefore, the professional associations GfA (Gesellschaft für Arbeitswissenschaft), GI (Gesellschaft für Informatik), VDE-ITG (The Information Technology Society in VDE) and VDI/VDE GMA (The Society for Measurement and Automatic Control in the VDI/VDE) agreed in 1998 on defining Useware as a new term.
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This reinforces the principal demand for structured development of user-centered user interfaces expressed e.g. by Ben Shneiderman (Shneiderman, 1998).