eol</span><span class="special">)</span>
</pre>
<p>
          (the rule reads as: match <code class="computeroutput"><span class="string">"description"</span></code>
          as long as it's not <span class="emphasis"><em>directly</em></span> followed by a valid identifier).
        </p>
<p>
          The <code class="computeroutput"><span class="identifier">distinct</span><span class="special">[]</span></code>
          directive is meant to simplify the rule above:
        </p>
<pre class="programlisting