> > I suspect Frank considers meaning to be a semantic concept, not a visual.
> I also suspect that, but then if we pick a char it will be
> undefined visually and its rendering (and TeX is essentially about
> rendering) will need _always_ additional information about the context
> (example: traditional idiograms in Japanese vs. simplified ones in
> Chinese).

I don't want to jump into the middle of this but to say that just
today I came across an interesting document on this subject from May
1995 by Dan Connolly at http://www.w3.org/MarkUp/html-spec/charset-harmful
that is formally an expired IETF draft.

                                    -- Bill