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Introduction SOA is an architecture approach for defining, linking, and integrating reusable business services that have clear boundaries and are self-contained with their own functionalities. Within this type of architecture, you can orchestrate the business services in business processes. Adopting the concept of services—a higher-level abstraction that's independent of application or infrastructure IT platform and of context or other services. Overview A basic SOA architecture is composed of a service provider, service, and an optional service directory. Application-to-application messaging is used in the information exchange. v   First the service provider creates a service and decides to expose it and publish it. v   Publishing is done by posting the service information on the service directory. v   On the other side, a service requester, in need of a certain service, searches the service directory for one that meets the necessary criteria. ...