Unifying E_Modifier and Extend in UAX 29 (i.e. the necessity of GB10)

[Richard Wordingham via Unicode]

On Tue, 2 Jan 2018 01:21:37 -0800
Asmus Freytag via Unicode <unicode at unicode.org> wrote:

> On 1/1/2018 6:52 AM, Richard Wordingham via Unicode wrote:

> > Generally yes, but I'm not sure that they'd be inappropriate for
> > Egyptian hieroglyphs showing human beings.  The choice of
> > determinative can convey unpronounceable semantic information,
> > though I'm not sure that that can be as sensitive as skin colour.
> > However, in such a case it would also be appropriate to give a skin
> > tone modifier the property Extend.

> They would be inappropriate because it's not part of the hieroglyphic 
> writing system to make those distinctions.

If the distinction is kept to indisputable pictures, then that does
keep it out of scope.  It just occurred to me that the painter might
choose the ethnically appropriate skin colour rather than just using
the Egyptian skin colour.

Richard.