           Generate <code class="computeroutput"><span class="identifier">str</span></code>,
                      if an attribute is supplied it must match
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      <a class="link" href="../../reference/string/symbols.html" title="Symbols Generator (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special">&lt;</span><span class="identifier">Attr</span><span class=