doc_markup_void_elements.xhtml

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<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE html

     PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

  <head class="head">

    <meta charset="utf-8" />

    <style>

    .before:before {

      content: "before";

    </style>

  </head>

  <body class="body">

    <h1>Test void elements in XHTML document</h1>

    <hr class="before" />

    <img />

    <hr />

    <br />

  </body>

</html>