public void testPrefixFromNSWithHyphenNumber() throws IOException {
XSDHelper xsdHelper = hc.getXSDHelper();
xsdHelper.define(xsdCornersURL.openStream(), xsdCornersURL.toString());
DataFactory df = hc.getDataFactory();
DataObject root = df.create("http://www.example.com/simple-1", "A");
root.setString("a1", "a1s");
root.setString("a2", "a2s");
String doc = hc.getXMLHelper().save(root, "http://www.example.com/simple-1", "a");
assertTrue(doc.indexOf("xmlns:s1=\"http://www.example.com/simple-1\"") != -1);