XML DTDs - slide "XHTML Document"

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html 
          PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
         "DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <title>Virtual Library</title>
</head>
<body>
   <p>Moved to <a href="http://vlib.org/">vlib.org</a>.</p>
</body>
</html>