A central part of ARCADE is its definition of a set of viewpoints to use as part of the architectural description. Each viewpoint defines how a specific view of the target system shall be described, including which UML diagrams to use. The context viewpoint defines how to describe the environment of the system, including system stakeholders and interfaces to other systems, while the requirement viewpoint deals with description of functional and quality requirements of the system. The component viewpoint defines how to describe the decomposition of the system into components, including their interfaces, interaction, and information. The logical distribution of components is the topic of the distribution viewpoint, while the realisation viewpoint deals with how to describe the realisation of the subsystems, including their deployment.