Sebastian Redl wrote:

> Look at it from an implementor's point of view. If a UA doesn't recognize
> an element, that simply means it doesn't know what to do with it, no
> matter if it's part of XHTML2 or not, or from what namespace it comes.

I am an implementor... And in an editor, I have no idea what this is
about.
And what is supposed to mean "know what to do with it" ?
Sorry, Sebastian, I don't buy that, this is under-specified.

</Daniel>