Hello, the Jboss Community

I have a question about how to use UserTask's Properties:Skippable and Priority.

As you can see,there are some informations in

http://docs.jboss.org/jbpm/v5.1/userguide/

12.1. Human tasks inside processes

Priority:An integer indicating the priority of the human task.

Skippable:Spesifies whether the human task can be skipped,i.e.,whether the actor may decide not to execute the task.

But I still don't know how to user these twos properties to control the human task.

Are there any detailed informations about these two properties?

And are there any sample projects?

Look forward to your guidance！

^-^