12.9. Domain Model Conclusion
Combining the conceptual classes, associations, and attributes discovered in the previous investigation yields the model illustrated in Figure 12.9.
Figure 12.9. A partial domain model.
A relatively useful domain model for the domain of the POS application has been created. There is no such thing as a single correct model. All models are approximations of the domain we are attempting to understand. A good domain model captures the essential abstractions and information required to understand the domain in the context of the current requirements, and aids people in understanding the domain—its concepts, terminology, ...
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