S21/generate.html#list-style"/>
  <link rel="help" href="http://www.w3.org/TR/CSS21/generate.html#before-after-content"/>
  <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#block-boxes"/>
  <meta name="assert" content="When the :before element is set as a list-item, it establishes a principal box and a marker box which is positioned outside of that principal box (since 'list-style-position:outside). The document tree content of the associated element must be placed after the principal box esta