<?xml version=“1.0”?> <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN” “www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”> <html>
<body> <h1><abbr>a</abbr> b</h1> </body>
</html>
<?xml version=“1.0”?> <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN” “www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”> <html>
<body> <h1><abbr>a</abbr> b</h1> </body>
</html>