What is a Model
Thomas Kühne · Dagstuhl Seminar Proceedings · 2005
With the recent trend to driven development a commonly agreed notion of \model becomes a pivotal issue. However, currently there is little consensus about what exactly a is and what it is not. Furthermore, basic terms such as \metamodel are far from being understood in the same way by all members of the modeling community. This article attempts to start establishing a consensus about generally acceptable terminology. Its main contribution is the distinction between two fundamentally different kinds of models, i.e. \type model versus \token model. The recognition of the fundamental difference in these two kinds of models is crucial to avoid misunderstandings and unnecessary disputes among members of the modeling community.