s="anchor"></a><code><span class="keyword">module</span> <a href="Ord/index.html">Ord</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-Semigroup"><a href="#module-Semigroup" class="anchor"></a><code><span class="keyword">module</span> <a href="Semigroup/index.html">Semigroup</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-Monoid"><a href="#module-Monoid" clas