How do I validate an XHTML+SMIL document?

I'm experimenting with XHTML+SMIL, as it works in IE 5.5/6 on Windows, and have it working, somewhat:

http://www.cadenceweb.com/templates/goldSMIL.html

But I can't get the page to validate. Obviously the standard XHTML Transitional won't let it validate, because it complains about the various bits of "t:":

Line 4, column 14: 
  <html xmlns:t="urn:schemas-microsoft-com:time" lang="en-us">
                ^
Error: there is no attribute "xmlns:t" for this element (in this HTML version)
I tried attaching the DOCTYPE from the HTML+SMIL draft, and it failed even worse, complaining that it didn't recognize the doctype at all:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML+SMIL //EN" 
          "htmlplussmil.dtd">

Is there a way to get such a page to validate?

Received on Sunday, 10 June 2001 19:23:19 UTC