In Unicode 13.0, a new block <https://www.unicode.org/charts/PDF/Unicode-13.0/U130-1FB00.pdf> was added to support graphical symbols used on legacy systems,[1] particularly those represented by obscure character encodings (like ATASCII <https://en.wikipedia.org/wiki/ATASCII>).[2]
I'm wondering if Troff's non-representable symbols (listed below) are eligible additions for this block. I'm envisioning their admission to use names like: \[sqrtex] radical symbol extension[3] \(ul troff under rule \(ru troff baseline rule \(bs troff client logotype[4] Giving these characters a canonical representation in Unicode won't benefit documents typeset by older troff(1) implementations, but it would simplify documentation of future Groff releases and smooth out wrinkles in text copied from gropdf(1) output. Does this seem realistic to anybody else? Or have I developed tunnel vision from dwelling on this idea too much? Regards, — John 1. https://www.unicode.org/L2/L2022/22016.htm#170-C15 2. A supplementary block <https://www.unicode.org/charts/PDF/Unicode-16.0/U160-1CC00.pdf> featuring Pac-Man and Space Invaders graphics has also been approved for the upcoming Unicode 16.0 (published next month). I think one of these "legacy computing" blocks gets the point across, however. 3. Complements ⎷ (U+23B7 <https://graphemica.com/%E2%8E%B7> radical symbol bottom). 4. I'm aware that corporate logos can't be added to the UCD (no matter how well-established they appear to be <https://emojipedia.org/apple-logo>), due to the conflict-of-interest regarding trademarks and brand representation. Hence why a more "diplomatic" name is suggested here, which relegates the exact appearance of \(bs to a font-level concern.
