6.5. Cross-Enterprise Integration Framework
An integration framework is essential to define different integration tiers and basic components or enabling technology for enterprise and cross-enterprise integration. It also outlines how each integration tier communicates with the other. The integration framework does not build on top of existing EAI vendor products. It can mix-and-match implementing any EAI vendor products with Web Services technology.
There are five different tiers of integration that need to be considered. Figure 6-1 provides a sample scenario where a user accesses Web Services functionality provided by a series of legacy back-end systems to perform a fund transfer. A client user has a unique network identity using a digital certificate ...
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