title: What does BBCODE_TYPE_ROOT mean?
body: <p>When using PHP's <a href="http://www.php.net/manual/en/book.bbcode.php" rel="nofollow">BBCode</a> extension, does anyone know what BBCODE_TYPE_ROOT means exactly? It doesn't seem necessary, at least with <a href="http://www.php.net/manual/en/function.bbcode-set-flags.php" rel="nofollow">this example</a>, however, it is used in most of the examples in the documentation.</p>
  
  <p><a href="http://www.php.net/manual/en/bbcode.constants.php" rel="nofollow">The documentation is pretty vague about this element</a>:</p>
  
  <blockquote>
    <p>BBCODE_TYPE_ROOT (integer)</p>
  
  <pre><code>This BBCode tag is the special tag root (nesting level 0).
  </code></pre>
  </blockquote>
  
  <p>Thank you in advance.</p>