Application Services (A Conceptual Model)
The concept of application services is not new by any standard. Service-oriented application architectures have been in use for many years, especially in relation to application integration. Figure 6.1 shows a conceptual model of an application service, as well as the roles and components of Web Services. The primary objective of an application service is to make specific functions accessible by external applications. Not all functions and services are integration-oriented. Some services are standalone, and their scope is restricted to one applications. Other services involve more than one application, and are more complex by definition.
Figure 6.1. Application services (roles and components).
An application ...
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