Hi,
As I understand you would like an (XSLT) stylesheet that will convert an xml file from one schema to another schema. This may be simple if they have corresponding elements, or it may be complex if some elements need to be computed or reformatted.
I have developed complex XML transformations with XSLT (and also with XQuery).
Please provide more details and example files so I can better understand the problem for this project.
Regards,
Grammal