<p>
        The top Spirit directory is:
      </p>
<pre class="programlisting"><span class="identifier">BOOST_ROOT</span><span class="special">/</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span>
</pre>
<p>
        Currently, the directory contains:
      </p>
<pre class="programlisting"><span class="special">[</span><span class="identifier">actor</span><span class="special">]</span>     <span class="special">[</span><span class="identifier">attr