I didnt get the meaning of following two statements from
http://struts.apache.org/2.x/docs/validation.html
1. The framework will also search up the inheritance tree of the action to find default validations for interfaces and parent classes of the Action.
2. If you are using the short-circuit attribute and relying on default validators higher up in the inheritance tree, make sure you don't accidentally short-circuit things higher in the tree that you really want!
Can you please help me understanding it.