model-isvalid.html

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<!DOCTYPE html>

<html>

<head>

  <meta charset=utf-8>

  <title>&lt;br&gt;</title>

</head>

<body>

  <!-- is structured inline -->

  <p>text <br class="class" lang="en"></p>

  <!-- is strictly inline -->

  <p>text <dfn><br class="class" lang="en"></dfn></p>

  <!-- must be empty -->

</body>

</html>