s="code"><span class="constructor">Hashtbl</span></code></a>,
   <a href="Map.html"><code class="code"><span class="constructor">Map</span></code></a> and <a href="Set.html"><code class="code"><span class="constructor">Set</span></code></a> modules.
</p><p>

   They only differ by their labels. They are provided to help
   porting from previous versions of OCaml.
   The contents of this module are subject to change.<br>
</p></div>
<hr width="100%">

<pre><span class="keyword">module</span> <a href="MoreLabe