XML 2 XML using XSL,DTD XALAN - JAVA

Hi,
I am using XALAN to transform my XML file to another XML file using XSL. I
have a small JAVA program which does this. Does anyone knows How to validate
an XML file against the DTD using JAVA ? Is there any methods available in
XALAN to implement this ? If yes, could you please send me a sample example
of how to it, please ?

Your help will be very much appreciated.

Thanks a lot,
Roger.

 
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