Ingrates
Martin Atkins: it is impossible to use Yadis in this way while having a conforming HTML 5 document. The current ethos for HTML 5 seems to be to remove any mechanism by which it can be extended in any way without going through the HTML working group and changing the core spec.
Just because YADIS didn’t have the foresight to use the officially sanctioned way to embed custom non-visible data is no reason to complain.