If you are using EMF standalone, i.e. you are not running it in an Eclipse-based environment, and you want to use OCL some additional steps have to be performed besides registering your resource factory.
This description is for the MDT OCL project which can be found and installed from the Juno update site under Modeling > OCL Examples and Editors.
Note: See the update on Eclipse Mars.
In this post I write about some things I discovered during the development of a project where Struts 2 is used. I note them since I couldn’t find them in the documentation and they were discovered through digging through pieces of documentation, the code and the web.
In general, sometimes more detailed information can be found in the Javadoc of the frameworks classes, e.g. interceptors.
Skipping validation for a specific method in an action class