schema upgrade

Hi,

I need to upgrade older version schemas to newer 2001 one standard.This is
an xsl for doing the same.

http://dev.w3.org/cvsweb/xmlschema/schemaRev2.xsl?rev=1.4&content-type=text/
x-cvsweb-markup&sortby=file

Any usage ideas of this xsl as this doesnt transform completely.Means some
preprocessing etc. is needed on the xsd before applying this transformation.

Thanks,
Shadab