59-1">
</head>

<body id="id-9" aria-atomic="true">
  <ul>
    <li> normal use of an li element</li>
  </ul>

  <ul>
    <li role="listitem"> redundant use of role 'listitem'</li>
  </ul>

  <ul role='none'>
     <li role="button">allowed because ul is no longer a 'list'</li>
  </ul>

  <ul role='menu'>
    <li role='button'>not allowed due to violation of menu hierarchy</button>
  </ul>

  <div role='tablist'>
    <ul role='presentation'>
      <li role=button>not allowed due to violation of tablist hierar