ef"><code><span class="keyword">include</span> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></span></summary><div class="spec module" id="module-I"><a href="#module-I" class="anchor"></a><code><span class="keyword">module</span> <a href="I/index.html">I</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><dl><dt class="spec value" id="val-non_zero_ring"><a href="#val-non_zero_ring" class="anchor"></a><code><span class="keyword">val</span> no