code: public Element createElementNS(String namespaceURI, String qualifiedName)
            throws DOMException
    {
  
      error(XMLErrorResources.ER_FUNCTION_NOT_SUPPORTED);
  
      return null;
    }
docs: Unimplemented. See org.w3c.dom.Document
  
  @param namespaceURI Namespace URI for the element
  @param qualifiedName Qualified name of the element
  
  @return null
  
  @throws DOMException