if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
  public String getNamespaceURI(String prefix)  {    if (XMLConstants.XML_NS_PREFIX.equals(prefix))      return XMLConstants.XML_NS_URI;    for (Iterator i = namespaces.iterator(); i.hasNext(); )      {        LinkedHashMap ctx = (LinkedHashMap) i.next();        String namespaceURI = (String) ctx.get(prefix);        if (namespaceURI != null)          return namespaceURI;      }    return null;  }