HTML 4.0 ??? 

Wie retro! 
 
	Code:
	Here is an example of an XHTML 1.1 document.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
    "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" >
  <head>
    <title>Virtual Library</title>
  </head>
  <body>
    
Moved to vlib.org.</p>
  </body>
</html>
  http://www.w3.org/TR/2001/REC-xhtml1...nformance.html