All documents must begin with a Document Type Declaration <doctype>
or DTD. The
<html lang="en"> <head> <title>Document missing doctype</title> </head> <body> </body> </html>
W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/