The header has to be XML-like:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/strict.dtd">
<html xmlns="http://www.w3.org/TR/xhtml1/strict" >
<head>
<title>A Small Document</title>
</head>
<body>
<p>A simple page!</p>
</body>
</html>
Ivan Herman, W3C Head of Offices | 16 July, 2002 | 4 (18) |