ch of the character encoding namespaces, we place tagged versions
          of parsers such as <code class="computeroutput"><span class="identifier">alnum</span></code>,
          <code class="computeroutput"><span class="identifier">space</span></code> etc.
        </p>
<p>
          Example:
        </p>
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><spa