Trang schema converter Trang converts between different schema languages for XML. It supports the following languages: * RELAX NG (XML syntax) * RELAX NG compact syntax * XML 1.0 DTDs * W3C XML Schema A schema written in any of the supported schema languages can be converted into any of the other supported schema languages, except that W3C XML Schema is supported for output only, not for input. in Software > Programming Languages > XML > DTDs and Schemaswith relaxngschemaw3cxml