In my opinion, you should not change class membership of existing
elements. Its class membership is a part of the definition of an element.
If you want to change that, then you are defining a new element, which
should (ipso facto) be given a different name.
On Fri, 12 Jul 2002, Ingo Mittendorf wrote:
> I've got a technical question concerning the movement of an existing element
> to another element class.
> If I want to do this, do I have to suppress this element first (as with
> other modifications - content model, attributes etc.)?
> The Guidelines mention in passing the possibility of adding existing
> elements to an element class under 'extending element classes', but only
> elaborate on how to add NEW elements to a class.
> Thanks for your help,
> Ingo Mittendorf