 Labels:</span></span>
<span><span class="co">#&gt;  value   label</span></span>
<span><span class="co">#&gt;    -91 Missing</span></span></code></pre></div>
<p>To ease the smooth inter-operation with packages
<strong>haven</strong> and <strong>labelled</strong>, the following
functions are of interest: <code class="sourceCode r"><span class="fu">undeclare</span>()</code>, <code class="sourceCode r"><span class="fu">as.haven</span>()</code> and <code class="sourceCode r"><span class="fu">as.declared</span>(