Open Source Document Management System | OpenKM

hi all,
i want to build simple mail system (send/receive between tow points) using GWT(Google Web Toolkit) in frontend and java/hibernate in backend . first i build simple GWT project as stand alone now i am try to plug in openkm. so i search a lot of document including "hello word example in wiki" but it really poor example and explain a few things.
please can any body help me with links,documents, aircraft, any things that help me to build UI using GWT and incude that UI in OpenKM

Have you read http://wiki.openkm.com/index.php/Frontend_extensions ?

The most easiest way is using a TabWorkspace and incluye there (iframe) all your app if you don't want to directly comunicate with OpenKM. If you need to comunicate with OpenKM then should use our API, for example if you want to extend some document feature should use TabDocument API, etc...

for what you're talking seems and independant application that you want to integrate visually with openkm no ? best option is that i said using TabWorkspace. If you need help with developing contact with us at http://www.openkm.com/en/contact.html

dear sir,
thanks for your care, i will read the frond end extension and try to build the ui.
thanks alot