Collaboration

• Conceptual (not physical) model building blocks
• Realises operations, use-cases and other classifiers (classes, interfaces, ...)
• Represented by dashed oval
• Collaborations are named
• Refers to static structures and dynamic interactions that are used for the realisations.
• collaborations use design patterns (common solutions to common problems in a context)
• Resilient to change in design: use design patterns
• Common mechanisms (design patterns in classes) are represented as collaborations
• Several collaborations can work together and one collaboration may be refined to another