Chapter 12. Rule archetype pattern

12.1 Business context

In various places in this book, we have mentioned rules. In this chapter, we explain exactly what we mean by rules and provide a simple Rule pattern.

When we first thought of presenting a Rule model, we expected it to be a normal pattern rather than an archetype pattern. However, as you will see, we have been able to establish a one-to-one correspondence between this pattern and the concepts of formal logic. As such, we believe that the pattern really represents mathematical, and therefore archetypal, notions of rules in a very direct way.

Our main purpose in providing this Rule pattern is to give you a concrete basis for understanding and working with the various kinds of rules you will ...

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