public String makeNSMapping(String uri) {
    String prefix = (String) prefixByUri_.get(uri);

    if (prefix == null) {
      return ("");
    }

    return (URelaxer.getNSMapping(prefix, uri));
  }
 public void makeQName(String uri, String localName, PrintWriter buffer) {
   URelaxer.makeQName(getPrefixByUri(uri), localName, buffer);
 }
 public String makeQName(String uri, String localName) {
   return (URelaxer.getQName(getPrefixByUri(uri), localName));
 }