3.6. The UML-F mechanism for defining new tags
Though standard UML provides stereotypes, tagged values, and constraints as extension mechanisms, together with a set of predefined stereotypes and tagged values, it does not offer a suitable way of defining additional stereotypes or tagged values. This is comparable with a programming language that allows calling methods of predefined libraries but does not conveniently allow the definition of new ones. Any language – whether it is a natural language, a programming language, or a modeling language – needs to provide a mechanism for extending its vocabulary. In natural languages, new vocabulary can be expressed through already-known words. Programming languages provide definition mechanisms for classes, ...
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