Protective signs

[Erik Carvalhal Miller]

On Sat, Feb 17, 2024 at 9:30 PM Steffen Nurpmeso via Unicode <
unicode at corp.unicode.org> wrote:

> That made me think (my local copy is from 2020, i do not recall
> anything), are "protective signs" part of Unicode already?
> Some are very hard, almost impossible i'd say, for fonts.
> But they are very important pictographics.  *Very*.
>
>   https://en.wikipedia.org/wiki/Protective_sign
>   https://de.wikipedia.org/wiki/Schutzzeichen
>
>   https://de.wikipedia.org/wiki/Barbarastollen_(Freiburg_im_Breisgau)


Some of the signs are in Unicode: the letters P and G (U+0050, U+0047), the
letters P and W (U+0050 again, U+0057), the letters I and C (U+0049,
U+0043), a white flag (U+2690 ⟨⚐⟩) and a waving white flag (U+1F3F3 ⟨🏳⟩),
a flag of the United Nations incorporating its emblem (the
regional‐indicator sequence U+1F1FA, U+1F1F3 ⟨🇺🇳⟩), the letters U and N
(U+0055, U+004E), and the thrice‐repeatable large orange circle
(U+1F7E0 ⟨🟠⟩).  Those that are not in the Unicode repertoire are dependent
on color and therefore suggest emoji, if ever they should be encoded.
Important as they may be, is there a plaintext use case, such as texting an
enemy to indicate a hospital?  (Note there is also U+1F3E5 HOSPITAL ⟨🏥⟩,
which in the font Iʼm working in incorporates a symbol similar to the red
cross…)
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