strings.addElement(url);
  StringVector processPREFIX_URLLIST(          StylesheetHandler handler, String uri, String name, String rawName, String value)            throws org.xml.sax.SAXException  {    StringTokenizer tokenizer = new StringTokenizer(value, " \t\n\r\f");    int nStrings = tokenizer.countTokens();    StringVector strings = new StringVector(nStrings);    for (int i = 0; i < nStrings; i++)    {      String prefix = tokenizer.nextToken();      String url = handler.getNamespaceForPrefix(prefix);      strings.addElement(url);            if (url != null)        strings.addElement(url);      else        throw new org.xml.sax.SAXException(XSLMessages.createMessage(XSLTErrorResources.ER_CANT_RESOLVE_NSPREFIX, new Object[] {prefix}));        }    return strings;  }