<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>&lt;del&gt;</title>
</head>
<body>
  <!-- can contain inline while in inline context -->
  <p>paragraph
    <del>
      <em>some</em> 
    </del>
  </p>

  <!-- can contain strictly inline while in strictly inline context -->
  <p><dfn>strictly inline
    <del>
      <em>text</em>
    </del>
  </dfn></p>

  <!-- can contain interactive if ancestor does not forbid it -->
  <p>paragraph
    <del>
      <a>link</a>
    </del>
  </p>
  <p><dfn>strictly inline
    <del>
      <a>link</a>
    </del>
  </dfn></p>
</body>
</html>