On Mon, Aug 13, 2012 at 3:12 AM, Michael[tm] Smith <m...@w3.org> wrote:
> There is no conceivable conformance checker that's going to allow the use > of completely arbitrary tag names. It doesn't matter what formalism it > uses. > To allow custom tag names and still be able to check the conformance of > normal tag names, the only possibility is to limit the custom tag names to > some recognized prefix -- e.g., x-fancyButton or whatever. <x:fancy-button>