code: public void setAttributeNS(
            String namespaceURI, String qualifiedName, String value)
              throws DOMException
    {
      error(XMLErrorResources.ER_FUNCTION_NOT_SUPPORTED);  //"setAttributeNS not supported!");
    }
docs: Unimplemented. See org.w3c.dom.Element
  
  @param namespaceURI Namespace URI of attribute node to set
  NEEDSDOC @param qualifiedName
  @param value value of attribute
  
  @throws DOMException