CHAPTER 6Specifying a Business Domain
. . . any thing so o’erdone is from the purpose of playing, whose end, both at the first and now, was and is, to hold as ’twere the mirror up to nature: to show virtue her feature, scorn her own image, and the very age and body of the time his form and pressure.
—William Shakespeare (1564–1616), Hamlet, Act III, Scene 2
The first step in creating a business services layer for a data-aware application is to create a business domain: components that correspond to your database tables, views, and synonyms, and that specify the business rules that your data follows. As we explained in Chapter 5, ADF BC models database tables, views, and synonyms as entity object definitions; it models relationships between them ...