Cover page by Eric Evans

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Five. A Model Expressed in Software

To compromise in implementation without losing the punch of a MODEL-DRIVEN DESIGN requires a reframing of the basics. Connecting model and implementation has to be done at the detail level. This chapter focuses on those individual model elements, getting them in shape to support the activities in later chapters.

This discussion will start with the issues of designing and streamlining associations. Associations between objects are simple to conceive and to draw, but implementing them is a potential quagmire. Associations illustrate how crucial detailed implementation decisions are to the viability of a MODEL-DRIVEN DESIGN.

Turning to the objects themselves, but continuing to scrutinize the relationship between ...

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