if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI)) return XMLConstants.XMLNS_ATTRIBUTE;
  public String getPrefix(String namespaceURI)  {    if (XMLConstants.XML_NS_URI.equals(namespaceURI))      return XMLConstants.XML_NS_PREFIX;    for (Iterator i = namespaces.iterator(); i.hasNext(); )      {        LinkedHashMap ctx = (LinkedHashMap) i.next();        if (ctx.containsValue(namespaceURI))          {            for (Iterator j = ctx.entrySet().iterator(); j.hasNext(); )              {                Map.Entry entry = (Map.Entry) i.next();                String uri = (String) entry.getValue();                if (uri.equals(namespaceURI))                  return (String) entry.getKey();              }          }      }    return null;  }