The increasing complexity of services required by users in Cloud Environments usually needs the definition of composite, value added services (VAS). Usage patterns and Use Cases definitions help in defining VAS, but a way to assure that new services reach the required goals with proper qualitative and quantitative properties has to be provided in order to validate design and implementation of composite services. In this paper the MetaMORP(h)OSY methodology and framework are introduced. The methodology uses Model Driven Engineering and Model Transformation techniques to analyze composite services. Due to the complexity of the systems to analyze, MetaMORP(h)OSY exploits Multi Agent System (MAS) in system definition. The methodology is used in order to define a model for a Use Case of the mOSAIC project.
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