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Implementing SOA: Total Architecture in Practice by Paul C. Brown

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Chapter 24. Identifiers (Unique Names)

Many business processes require distinguishing one individual from another. When you place an online order, the business needs to be able to distinguish you as an individual from your next-door neighbor. Similarly, the business needs to distinguish the order you place today from the one you placed yesterday. The way this is approached is to give a unique name to each object—each person or order. Such unique names are called identifiers.

Identifiers are simply unique numbers or strings that are created and assigned to individual objects. These identifiers are then used to represent individual objects in the systems. When a customer places an online book order, he or she creates an account (if one doesn’t already ...

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