On Thu, 17 May 2018 08:43:35 -0800 James Kass via Unicode <unicode@unicode.org> wrote:
> This page describes the essentials of OpenType Arabic font > development: > > https://docs.microsoft.com/en-us/typography/script-development/arabic But isn't the problem that PUA diacritics won't reach most Arabic shapers? I think we're back to the vexed issue of defining Unicode properties for PUA characters to applications. Richard.