Completely valid HTML5 document

This is a completely valid HTML5 document, with no errors or warnings given by the W3C HTML Markup Validator, as long as the character encoding (charset) specified by the server in the HTTP header is UTF-8 (which it should be!)
It should be used as a template when starting to write another HTML5 document. Note, though, that I don't recommend embedding Javascript into HTML at all (though it is legal), but rather always referencing scripts in other files. This way, all the scripts being run are guaranteed to appear in Chrome's "scripts" tab. I uploaded it to my server at http://www.game-point.net/misc/scratchpads/completelyValidDoc/index.htm. Check conformance here.
Actually, HTML after HTML4 won't really be called HTML5; it'll be a 'living standard' just called 'HTML'. But, as that can be confused with other versions of HTML, this 'living standard' is still being referred to as HTML5 for the time being.
Docs from WHATWG detailing 'HTML5':

Raphael output test (text without, and with, attr 'blur: 1'):