Nope. HTML 5 actually loosens the strictness of the markup language considerably and HTML 5 DOES NOT have to be XML compliant.

XHTML compliance was a whole lot of hui anyway, given that it literally had nothing to do with how the browser would render and only for validators to give you information on what doesn't match the XHTML schema.

HTML5 is much looser in terms of what is allowed. For one thing it allows for dynamic tags on most elements with the new data api (data-id, data-value, data-anything) which breaks XHTML schema.

AFAIK, there's an XHTML 2.0 draft out there but it's pretty much dead at this point.

Good riddance. XHTML was a farce.

+++ Rick ---

>I see that everything has to be XML compliant. That would probably be the big change wherever it has to be applied. So, in general, if I would want to benefit of HTML5 related tags, I would need to make sure the entire page is XML compliant. As of today, are most browsers compliant with HTML5?