on of <code>s</code> with name <code>name</code> in file <code>fname</code>. Global graph drawing options can be specified with the <code>options</code> optional argument.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-dot_output_oc"><a href="#val-dot_output_oc" class="anchor"></a><code><span><span class="keyword">val</span> dot_output_oc : 
  <span>string <span class="arrow">&#45;&gt;</span></span>
  <span><span class="xref-unresolved">Stdlib</span>.out_channel <span class="