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Extending the Web Service
Framework 
The Web services framework defines several extension points. They allow for a pluggable way for enhancing the functionality of the framework. This section will provide a developer view of these components, and will explain how they are registered at runtime.
The components that will be described later are:
The server-side components and the client-side components will be examined separately, because although they have similar functionality, the details and responsibilities of each of them are different.

It is not necessary to implement them in different classes. You need to implement several interfaces and register this component on several places.
