I just found out from the w3c site that XHTML 2 exists - so I went ahead and put the doctype in my document:

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 2.0//EN"
	"TBD">
I then went to the validator at w3c, and got these 2 things:

Warning:

Unknown namespace (http://www.w3.org/2002/06/xhtml2) for text/html document!
and...

Line 4 column 45: value of fixed attribute "xmlns" not equal to default

<html xmlns="http://www.w3.org/2002/06/xhtml2" xml:lang="en">
What can I do to fix this? Or should I just stick to XHTML 1.1?