We describe the Design Pattern Modelling Language, a notation supporting the specification of design pattern solutions and their instantiation into UML design models. DPML provides a set of modelling constructs allowing design pattern solutions to be modelled and reused. A corresponding notation links design pattern solution elements to UML model elements, verifying fulfilment of the design pattern in the UML model. A prototype tool is described, together with an evaluation of the language and tool..
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