UML Collaboration Diagrams
A major task of the design phase is creating the interaction diagrams for the system operations. Read this section to learn more about collaboration diagrams. As you go through the examples, pay attention to general principles in assigning responsibilities.
Ask yourself, how do you determine the relationship between objects? How can you extract the classes? How do you determine whether a mentioned feature can be considered as a class attribute or not? How would you determine class methods?
A contract for system operations describes what the system operation does, but it does not show a solution of how software objects are going to work collectively to fulfill the contract of the operation. The later (how) is specified by an interaction
diagrams in UML. A major task of the design phase is to create the interaction diagrams for the system operations.
Source: Ellen Ambakisye Kalinga, https://oer.avu.org/bitstream/handle/123456789/667/CSI%203104_EN%20Object%20Oriented%20Analysis%20and%20Design1.pdf?sequence=1&isAllowed=y
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