sign">|</span>&nbsp;<span class="constructor">Open_excl</span><br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Open_binary</span><br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Open_text</span><br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Open_nonblock</span><br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;open_out&nbsp;:&nbsp;string&nbsp;<span class="keywordsig