</span> <span class="identifier">char_type</span> <span class="special">&gt;</span> <a name="boost.log.sinks.basic_event_log_backend.string_type"></a><span class="identifier">string_type</span><span class="special">;</span>                 <span class="comment">// String type. </span>
  <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">string_type</span> <span