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Model based user interface development with HCI patterns: variatio delectat

This paper focus on the variety and the necessity of flexibility when it come to model driven or model based user interface design (MBUID) in conjunction with HCI patterns. Many approaches for user interface design that use graphical models or (semi-)formal textual notation have been developed in recent years and HCI or usability patterns are also well known (at least in theory), but in practice this combination still waits for its breakthrough. What obstacles stand in the way of an intensive usage of MBUID and HCI patterns? Some answers to this questions are given.