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Enterprise Patterns and MDA: Building Better Software with Archetype Patterns and UML by Ila Neustadt, Jim Arlow

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Chapter 11. Money archetype pattern

11.1 Business context

In this chapter we describe the Money archetype pattern.

The purpose of money is to allow trade to take place without barter. Instead of a direct exchange of goods or services for other goods or services, these are exchanged for some token that represents purchasing power. This token is money.

Nowadays, money consists of a number of floating currencies whose exchange rates are set by the money markets. The value of a unit of currency depends on the degree of trust that the world money markets place on the government, or other body, that issues that currency.

The value of each currency moves up and down relative to all the other currencies, according to supply and demand speculation. Because ...

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