How to convert an invalid XML to be a Valid XML?

["Sreeni Yetchina -X \(syetchin - Pure Solutions at Cisco\)" <syetchin@cisco.com>]

Hi Friends,

 

I am trying for a solution to convert an invalid XML to be a valid XML with respect to a given DTD/Schema.

 

I know that we need to define some default assumptions for mandatory elements, but is there any way to do this either with an XSLT transformation or by using a native code either in Java/C#/PERL/Python ??

 

Please share your ideas about this....

Thanks in advance,

Sreeni