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

[Asmus Freytag via Unicode]

On 1/1/2018 6:52 AM, Richard Wordingham via Unicode wrote:
> On Mon, 1 Jan 2018 13:24:29 +0530
> Manish Goregaokar via Unicode <unicode at unicode.org> wrote:
>
>> <random non-emoji, skin tone modifier> sounds very much like a
>> degenerate case to me.
> 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.

"Over expressiveness" is sometimes a problem rather than a feature when 
it comes to Unicode.
A./
>
> Richard.
>