[NTG-context] Latin setupmathematics

Hans Åberg haberg-1 at telia.com
Sun May 15 16:28:16 CEST 2016


> On 15 May 2016, at 15:37, Hans Hagen <pragma at wxs.nl> wrote:
> 
> On 5/14/2016 7:11 PM, Hans Åberg wrote:
>> In order to align with Unicode, \setupmathematics might have Latin shape options, as the Greek ‘lcgreek’ and ‘ucgreek', say ‘lclatin' and ‘uclatin', both defaulting to ’italic’. Unicode added the Latin italic symbols to the Math Alphanumeric Symbols range, so the upright letters are inaccessible when italic is assigned to the Basic Latin (ASCII) range.
> 
> I'm not sure what you mean. One can use \mathupright if needed. We support all the alphabets and these are independent of the basic latin range.

Traditionally constants are set in upright and variables in italic. So constants like “log” etc., are set in upright. It is not used rigorously because of past typographical limitations, but one might in principle do that, cf. the example below, where the integral differential “d” is set in upright to disambiguate relative the function named “d”.

When Unicode added math styles, it added italics, expecting the ASCII range to be upright, which would be normal if using a text editor that does not translate math into italics. But the TeX legacy is the opposite.

----
\setupbodyfont[xits,10pt]

\startformula
 \startalign
   I &= ∫_S d(x)\, dx \NR
   I &= ∫_S 𝑑(x)\, dx \NR
   I &= ∫_S d(x)\, \mathupright{d} x \NR
   I &= ∫_S 𝑑(x)\, \mathupright{d} x \NR
 \stopalign
\stopformula
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