On Sun, Feb 9, 2025 at 3:50 PM John C Klensin <john-ietf@xxxxxxx> wrote:
"use of private code points is
ok if you have some sort of reason".
It seems like that is the reason they exist. This is (U+F8FF).* It might be a square on your computer, but I can still send it.
This one is a bit of an artifact, since people mostly just use stickers/images when they want to use non-standard emoji these days.
I'll send it to the IETF list here, but not to be a dork. It shows that these must be dealt with, if you want to interoperate with HTTP and SMTP etc in the real world.
The same cannot be said for control characters, surrogates, and other things eliminated here. One can imagine that a JSON protocol that needed to interoperate with XML might choose "XML Characters".
thanks,
Rob
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