On Sat, Jan 16, 2010 at 8:25 PM, Aryeh Gregor
Microdata is also safe to use for deployment. Like
technologies maintained by the WHATWG, it will not change once it's
widely adopted, and Wikipedia adoption would probably count as wide
adoption by itself. Note that microdata, like all of HTML5, is at
Last Call at the WHATWG, independent of its status as Working Draft in
I've asked Hixie how stable Microdata is. Since he's the sole person
who decides on changes to HTML5 at the WHATWG, as you know, his answer
should be authoritative.
[100116 20:35:42] <AryehGregor> I assume that if Wikipedia starts
using it on a large scale and we do a MediaWiki release and such,
though, you won't change it after that and break all our content,
[100116 20:35:56] <Hixie> correct
So it's certainly stable enough for us to use.