Given the power of an ESB to support SOA implementations it is imperative to understand in detail the functions and structure of the ESB. This paper will describe each of the key ESB functional areas
through exposition of its function and benefits accompanied by conceptual structure diagrams based on an industry-standard approach, UML (Unified Modeling Language). The use of UML diagrams provides a conceptual view of the ESB components - and is useful for learning and discussion of the ESB mechanism. Other diagrams provided in this document employ ESB notation from David Chappell's book Enterprise Service Bus and are used to depict examples of more expansive ESB use cases.
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