I am playing around with Follow-up operations and Event Handlers. Both
extension points support extensionService child. What is this used for?
I understand the class set at parent level (operationParticipant and
eventHandler) can do the work...?

Thanks in advance,

Chemi.

The extensionService element is needed if your event handler wants to get access to other services (for example, IRepositoryItemService).

<extension point="com.ibm.team.process.service.eventHandlers">
   <eventHandler
     id="com.ibm.team.process.example.saveHandler"
     class="com.ibm.team.process.internal.example.process.server.SaveEventHandler"/>
     eventCategory="com.ibm.team.process.example.save"
     name="Example Save Handler">
     <extensionService
       componentId="com.ibm.team.process.example.saveHandler"
       implementationClass="com.ibm.team.process.internal.example.process.server.SaveEventHandler">
       <prerequisites>
         <requiredService interface="com.ibm.team.repository.service.IRepositoryItemService"/>
         <requiredService interface="com.ibm.team.process.example.common.IExampleService"/>
       </prerequisites>
     </extensionService>
   </eventHandler>
 </extension>