need not be concerned 
  at all with the <tt>ContextT</tt> template parameter unless you wish to tweak 
  the low level behavior of the subrule. Detailed information on the <tt>ContextT</tt> 
  template parameter is provided <a href="indepth_the_parser_context.html">elsewhere</a>. 
</p>
<p>Presented above is the public API. There may actually be more template parameters 
  after <tt>ContextT</tt>. Everything after the <tt>ContextT</tt> parameter should 
  not be of concern to the client and are strictly for