[i18n-activity] Define that (and how) glyph assemblies are mirrored in rtl formulas (#1839)

bert-github has just created a new issue for https://github.com/w3c/i18n-activity:

== Define that (and how) glyph assemblies are mirrored in rtl formulas ==
B.4 Unicode-based Glyph Assemblies
https://www.w3.org/TR/mathml-core/#unicode-based-glyph-assemblies

1) Maybe this section should say explicitly that the glyph assemblies are mirrored in rtl formulas. Firefox and Safari mirror them already, Chromium doesn't (but maybe that's an implementation bug).

2) Unicode defines for some symbols what their mirrored versions are, but it doesn't do so for these ‘extension’ characters. So maybe the MathML Core spec itself should list the mirrored glyphs. It could add them as an extra column in the table.

(There is a document on the Unicode site ([‘Glyph mirroring: ExtraMirroring.txt’](https://www.unicode.org/L2/L2022/22026r-non-bidi-mirroring.pdf)) that proposes to add these extension character to the ones for which Unicode defines mirrored glyphs. I don't know what its status is.)

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Received on Thursday, 28 March 2024 00:25:28 UTC