span class="identifier">exclusive_less_than</span><span class="special">&lt;</span> <span class="identifier">interval_type</span> <span class="special">&gt;</span>                         <a name="boost.icl.separate_interval_set.interval_compare"></a><span class="identifier">interval_compare</span><span class="special">;</span>       <span class="comment">// Comparison functor for intervals. </span>
  <span class="keyword">typedef</span> <span class="identifier">exclusive_less_than</span><span class="specia