Setting setValidating(true) requests DTD validation and causes a failure if no DTD exists. If you only want schema validation and not DTD validation then use setValidating(false). From the Javadoc for setValidating().
In these dais I had the same problem; I found this thread looking for a solution. My solution was to use an EntityResolver. Seems like set the Schema is not enought... not for me at least.
This is an EntityResolver example.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.