System.out.println("Reading " + jxl20File.getAbsolutePath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(true);
DocumentBuilder db = dbf.newDocumentBuilder();
db.setEntityResolver(new JXLEntityResolver());
Document document = db.parse(jxl20File);
System.out.println("Converting to JXL 2.1");
JXL21Converter.Convert(document);