Upright partial differential symbol (U+2202)

[zepinglee]

I am writing a LaTeX thesis template which is required to conform ISO 80000-2:2009 standard and I use unicode-math package to configure stix2-otf font. The unicode-math package has an option to choose upright or italic style of the symbol U+2202 partial differential but stix2 only provides an italic style.

A minimal example of XeLaTeX code:

\documentclass{article}
\usepackage[math-style=ISO,bold-style=ISO,partial=upright]{unicode-math}
\setmathfont{STIX2Math.otf}
\begin{document}
\[
  \partial \symup{\partial} \mitpartial
\]
\end{document}

The output is:

It would be better if stix provides an upright version of partial differential symbol since the ISO standard prefers the upright style.

[davidmjones]

Thank you for reporting this. We'll try to add it to the 2.0.1 milestone if there is still time.

[tiroj]

Logged to fix in 2.0.1

Proposed fix is to make the upright form the default for U+2202 (regular) and U+1D6DB (bold) in the Math font, so for the italic it would be necessary to use U+1D715 and U+1D74F.

Q. At present, we have –script and –scriptscript scaling variants for the italic (U+1D715) partial diff signs. Am I right in thinking that for the ISO standard it would also be helpful to add –script and –scriptscript variants of the revised upright U+2202?

[tiroj]

[✓ Tiro internal]

[davidmjones]

That seems like a good approach. Adding script and scriptscript variants might as well wait until we decide whether to implement it more widely.

[tiroj]

I went ahead and added the script and scriptscript variants of the upright U+2202, but not for the bold U+1D6DB.