Open Source Document Management System | OpenKM

According to http://docs.jboss.org/jbpm/v3/userguide ... lling.html theres is a nodetype Node where you can write your own code to be executed by process engine. Also you can define events and actions.
Does OpenKM support nodetype Node, Events and Actions?
Can I use Java in there like here and what methods of OpenKM could be used inside those scripts?

Yes, OpenKM includes the jBPM 3.2.3 workflow engine.

What OpenKM methods and variables are available for use in Java code attached to workflow Node or Action?

You can call any OpenKM API method from these implementation classes.