An extension activity is used to extend the WS-BPEL process language by introducing a new activity type.
The contents of an <extensionActivity> element must be a single element that must make available WS-BPEL's standard-attributes and standard-elements.
Syntax:
<extensionActivity
<anyElementQName standard-attributes>
standard-elements
</anyElementQName>
</extensionActivity>
Mapping
You design an extension activity using a process object with an <<ExtensionActivity>> stereotype. You use the Action description box to define the extension definition.