code: XSLTElementProcessor getProcessorForUnknown(String uri, String localName)
    {
  
      // XSLTElementProcessor lreDef = null; // return value
      if (null == m_elements)
        return null;
  
      int n = m_elements.length;
  
      for (int i = 0; i < n; i++)
      {
        XSLTElementDef def = m_elements[i];
  
        if (def.m_name.equals("unknown") && uri.length() > 0)
        {
          return def.m_elementProcessor;
        }
      }
  
      return null;
    }
docs: Given an unknown element, get the processor
  for the element.
  
  @param uri The Namespace URI, or an empty string.
  @param localName The local name (without prefix), or empty string if not namespace processing.
  
  @return normally a {@link ProcessorUnknown} reference.
  @see ProcessorUnknown