eyword">sig</span><br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;copy&nbsp;:&nbsp;(&lt;&nbsp;..&nbsp;&gt;&nbsp;<span class="keyword">as</span>&nbsp;<span class="keywordsign">'</span>a)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a<br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;id&nbsp;:&nbsp;&lt;&nbsp;..&nbsp;&gt;&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;=&nbsp;<span class="string">"%field1"</span><br>
&nbsp;&nbsp;<span class="keywo