> HTML might be succesful, but it's hardly because of following the Postel principle. I think if webbrowsers were not lenient with HTML parsing the web would h

> HTML might be succesful, but it's hardly because of following the Postel principle. I think if webbrowsers were not lenient with HTML parsing the web would have been adopted much slower in the initial years. Also, HTML5 can be seen as a confirmation that XHTML2 with a strict parsing would not be successful. I followed the WHATWG mailing lists quite closely when that effort began. This is evidence for the applicability of Postel's law at least in the case of HTML.