[Unicode] Re: Implementation of ideographic description characters

[suzuki toshiya]

Maybe, some precomposed glyphs (without standardized code points) are included
in the font, and the registered IDS strings are internally converted to the
glyph index to them, by ligature feature of OpenType. I guess, the
"composition"-like behaviour is just visible for the set of IDS registered in
the font, and the unregistered IDS string would not be displayed as single
composed glyph.

gfb hjjhjh wrote:
> Seems like Source Han Serif have just implemented such functionality? Or is this just partial. https://twitter.com/tualatrix/status/849178587680735232
>