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| subject > component > layer > model^2 | 
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| model^2 comparison table | |||||||
| Subject | use | know | has definition | see also | contain | is a subtopic of | is a kind of | 
|---|---|---|---|---|---|---|---|
| layer | A subsystem that provides a set of services and has layer cohesion | 9.2 - Principles Leading to Good Design | component | ||||
| model^2 | the observer design pattern to separate it from the view | what view and controller are attached to it | The functional layer in the MVC architectural pattern - the underlying classes whose instances are to be viewed and manipulated | model | contains the underlying classes whose instances are to be viewed and manipulated | 9.5 - Architectural Patterns | layer | 
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