Listing 2.2. Kod XHTML pierwszej strony WWW
<!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="pl" lang="pl">
  <head>
    <title>Witaj</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  </head>
<body>
<p>Moja pierwsza strona.</p>
</body>
</html>