4 ms·

Wikipedia calls it the "No Symbol" [0]. ISO 7010 calls it the "prohibition sign" [1]. In Unicode, it's available as a combining character with the practical n

Wikipedia calls it the "No Symbol" [0]. ISO 7010 calls it the "prohibition sign" [1]. In Unicode, it's available as a combining character with the practical name "COMBINING ENCLOSING CIRCLE BACKSLASH" (U+20E0) [2] and in emoji form it's the "NO ENTRY SIGN" (U+1F6AB) [3]. 0: https://en.wikipedia.org/wiki/No_symbol https://en.wikipedia.org/wiki/No_symbol 1: https://en.wikipedia.org/wiki/ISO_7010 https://en.wikipedia.org/wiki/ISO_7010 2: https://www.compart.com/en/unicode/U+20E0 https://www.compart.com/en/unicode/U+20E0 3: https://www.compart.com/en/unicode/U+1F6AB https://www.compart.com/en/unicode/U+1F6AB

mistersquid 3y ago
> Wikipedia calls it the "No Symbol" [0]. ISO 7010 calls it the "prohibition sign" [1]. “Circle-bar” to my mind is the most eloquent and evocative of the names I’ve seen for this symbol. I can’t remember where I heard/read “circle-bar” which was many many years ago.
- pimlottc 3y ago
  "Slashed circle" is the most succinct description I can come up with. To me, "bar" suggests a horizontal line, like a capital-Theta Θ
  - fsckboy 3y ago
    yes, the "do not enter" sign is a circle and bar
HPsquared 3y ago
No entry should be a red circle background with horizontal white bar across the centre.
- layer8 3y ago
  That’s U+26D4: https://www.compart.com/en/unicode/U+26D4 https://www.compart.com/en/unicode/U+26D4 U+1F6AB is for roundtrip compatibility with the Japanese KDDI emoji set (#31 here: http://emoji.digital/kddi-au/ http://emoji.digital/kddi-au/).
NelsonMinar 3y ago
Those date from 1993 and 2010. There's also U+26D4 NO ENTRY (2009) and U+1F6C7 PROHIBITED SIGN (2014). I wonder what the history is that we ended up with four different code points for a similar concept.
- pimlottc 3y ago
  I included just the ones that were the same visual representation, U+26D4 is a different symbol. The glyph for U+1F6C7 seems to be missing in most places, I can't find an authoritative representation of it to confirm it's the same visual symbol. EDIT: Looks like U+1F6C7 "PROHIBITED SIGN" is indeed the same symbol, as seen in the Unicode 7.0 charts [0] 0: https://www.unicode.org/charts/PDF/Unicode-7.0/U70-1F680.pdf https://www.unicode.org/charts/PDF/Unicode-7.0/U70-1F680.pdf
  - JadeNB 3y ago
    > I included just the ones that were the same visual representation, U+26D4 is a different symbol. The glyph for U+1F6C7 seems to be missing in most places, I can't find an authoritative representation of it to confirm it's the same visual symbol. I don't think that there's any meaningful sense in which two Unicode code points may be said to have, or not have, the same symbol, except in reference to a particular font. The standard just indicates some possibilities: > The shapes of the reference glyphs used in these code charts are not prescriptive. Considerable variation is to be expected in actual fonts. The particular fonts used in these charts were provided to the Unicode Consortium by a number of different font designers, who own the rights to the fonts.
    - pimlottc 3y ago
      Sure, but the topic at hand here is not unicode code points, but a particular visual symbol.
- philwelch 3y ago
  And yet we still needed to do Han unification. Unicode is ridiculous at this point.

mistersquid 3y ago

> Wikipedia calls it the "No Symbol" [0]. ISO 7010 calls it the "prohibition sign" [1]. “Circle-bar” to my mind is the most eloquent and evocative of the names I’ve seen for this symbol. I can’t remember where I heard/read “circle-bar” which was many many years ago.

pimlottc 3y ago
"Slashed circle" is the most succinct description I can come up with. To me, "bar" suggests a horizontal line, like a capital-Theta Θ
- fsckboy 3y ago
  yes, the "do not enter" sign is a circle and bar

HPsquared 3y ago

No entry should be a red circle background with horizontal white bar across the centre.

layer8 3y ago
That’s U+26D4: https://www.compart.com/en/unicode/U+26D4 https://www.compart.com/en/unicode/U+26D4 U+1F6AB is for roundtrip compatibility with the Japanese KDDI emoji set (#31 here: http://emoji.digital/kddi-au/ http://emoji.digital/kddi-au/).

NelsonMinar 3y ago

Those date from 1993 and 2010. There's also U+26D4 NO ENTRY (2009) and U+1F6C7 PROHIBITED SIGN (2014). I wonder what the history is that we ended up with four different code points for a similar concept.

pimlottc 3y ago
I included just the ones that were the same visual representation, U+26D4 is a different symbol. The glyph for U+1F6C7 seems to be missing in most places, I can't find an authoritative representation of it to confirm it's the same visual symbol. EDIT: Looks like U+1F6C7 "PROHIBITED SIGN" is indeed the same symbol, as seen in the Unicode 7.0 charts [0] 0: https://www.unicode.org/charts/PDF/Unicode-7.0/U70-1F680.pdf https://www.unicode.org/charts/PDF/Unicode-7.0/U70-1F680.pdf
- JadeNB 3y ago
  > I included just the ones that were the same visual representation, U+26D4 is a different symbol. The glyph for U+1F6C7 seems to be missing in most places, I can't find an authoritative representation of it to confirm it's the same visual symbol. I don't think that there's any meaningful sense in which two Unicode code points may be said to have, or not have, the same symbol, except in reference to a particular font. The standard just indicates some possibilities: > The shapes of the reference glyphs used in these code charts are not prescriptive. Considerable variation is to be expected in actual fonts. The particular fonts used in these charts were provided to the Unicode Consortium by a number of different font designers, who own the rights to the fonts.
  - pimlottc 3y ago
    Sure, but the topic at hand here is not unicode code points, but a particular visual symbol.
philwelch 3y ago
And yet we still needed to do Han unification. Unicode is ridiculous at this point.