Ram,
Note that ejb-jar.xml is not WebSphere specific. You can see a
simple example or look at the
DTD for a complete list of attributes that you can put in this file.
The other xml files are WebSphere specific. They are also optional. You can configure them through the admin console when deploying. I'm not aware of any documentation on their format. You could try looking at the
list of IBM specific files to see if anyone has posted examples on the web.