/span> <span class="identifier">time_system_type</span><span class="special">::</span><span class="identifier">time_rep_type</span>      <a name="boost.posix_time.ptime.time_rep_type"></a><span class="identifier">time_rep_type</span><span class="special">;</span>     
  <span class="keyword">typedef</span> <span class="identifier">time_system_type</span><span class="special">::</span><span class="identifier">time_duration_type</span> <a name="boost.posix_time.ptime.time_duration_type"></a><span class="ident