In last night's ConTeXt meeting there was a discussion on the use of
vertical or slanted double primes for inches. The general consensus was
that slanted should be used.
I had a look in my copy of The Elements of Typographic Style version
3.0 by Richard Bringhurst and he says (page 307]:
"Double Prime. An abbreviation for inches (1" =2.54 cm) and for seconds
of arc (360" = 1 degree). Not to be confused with quotation marks, the
double acute, nor with dumb quotes. Prime and double prime are rarely
found on text fonts. See also prime. [U+2033]"
Similarly for prime he says (page 316):
"Prime. An abbreviation for feet (1' = 12") and for minutes of arc (60'
= 1 degree). Singe and double primes should not be confused with
apostrophes, dumb quotes or genuine quotation marks, though in some
faces (frakturs especially) these glyphs may all have a similar shape
and a pleasant slope. See also apostrophes, double prime, dumb quotes
and quotation marks. [U+2032]"
Hope this clarifies things.
Best Wishes
Keith McKay
On 13/11/2024 14:09, Hans Hagen via ntg-context wrote:
On 11/13/2024 11:03 AM, Marco Patzer wrote:
On Mon, 11 Nov 2024 21:30:15 +0100
Wolfgang Schuster <wolfgang.schuster.li...@gmail.com> wrote:
\unit{2 arcsecond}
Arcseconds might print the correct glyph, but would be semantically
wrong. I believe the correct approach would be:
\unit{2 inch}
The question then remains how to configure \unit{2 inch} to produce
(depending on the requirements):
2 in or
2"
After 25 hours of discussion and 18 attempts the math team (whoever
that is) has decided that this is good enough:
\permanent\protected\def\fakeminute
{\dontleavehmode
\begingroup
\doifelseitalic
{\scratchwidth\fontcharwd\font\singlequoteasciicode
\hpack \s!to 1.2\scratchwidth \bgroup
\glyphslant\plustwohundred
\glyph \s!xoffset -0.6\scratchwidth\singlequoteasciicode
\egroup}%
{\scratchwidth\fontcharwd\font\singlequoteasciicode
\hpack \s!to 1.1\scratchwidth \bgroup
\glyphslant\plusfivehundred
\glyph \s!xoffset -\scratchwidth\singlequoteasciicode
\egroup}%
\endgroup}
\permanent\protected\def\fakesecond
{\dontleavehmode
\begingroup
\doifelseitalic
{\scratchwidth\fontcharwd\font\singlequoteasciicode
\hpack \s!to 1.7\scratchwidth \bgroup
\glyphslant\plustwohundred
\glyph \s!xoffset -0.6\scratchwidth\singlequoteasciicode
\glyph \s!xoffset -1.1\scratchwidth\singlequoteasciicode
\egroup}%
{\scratchwidth\fontcharwd\font\singlequoteasciicode
\hpack \s!to 1.6\scratchwidth \bgroup
\glyphslant\plusfivehundred
\glyph \s!xoffset -\scratchwidth\singlequoteasciicode
\glyph \s!xoffset -1.5\scratchwidth\singlequoteasciicode
\egroup}%
\endgroup}
\permanent\protected\def\minute{\iffontchar\font\textminute\textminute\else\fakeminute\fi}
\permanent\protected\def\second{\iffontchar\font\textsecond\textsecond\else\fakesecond\fi}
\aliased\let\inch\second
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