CHAPTER 7Assembling a Data Model

All is waste and worthless, tillArrives the selecting will,And out of slime and chaos, WitDraws the threads of fair and fit.

—Ralph Waldo Emerson (1803–1882), Wealth

Chapter 6 explained how to create entity object definitions and associations to represent features of the database and encapsulate business logic. This chapter discusses how to create view object definitions that query data from the database and view link definitions that specify relationships between query results. It also discusses application module definitions that specify a data model—a collection of view object and view link instances—for other parts of your application.

This chapter answers the following questions:

What are view object definitions, ...

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