MONAD</a> = <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module-type" id="module-type-ALT"><a href="#module-type-ALT" class="anchor"></a><code><span class="keyword">module</span> <span class="keyword">type</span> <a href="module-type-ALT/index.html">ALT</a> = <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module-type" id="module-type-PLUS"><a href="#module-type-PLUS" class="anchor"></a><code><span class