<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>&lt;p&gt;</title>
</head>
<body>
  <!-- is block -->
  <p class="class" id="id" xml:lang="en">text</p>

  <!-- can contain interactive -->
  <p><a>text</a></p>
</body>
</html>