Summary

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The Windows DNA architecture consists of a logical three-tier model and a physical three-tier model. These two models provide a framework that can be used to design and build your DNA systems. The models are extremely flexible and can be used for a wide range of systems.

In the next several chapters, we will look at how XML can be used in the three-tier model. You will learn how to create user, business, and data services components using XML. And you will learn how to use the BizTalk Server.