On 9/12/2021 9:45 AM, Wolfgang Schuster via ntg-context wrote:
Marcel Fabian Krüger via ntg-context schrieb am 12.09.2021 um 01:12:
Hi,

On Sun, Sep 12, 2021 at 12:01:08AM +0200, Hans Hagen wrote:
      \definefontfeature
        [default:test]
        [default]
        [cv36=2,cv26=6]
What is the number supposed to indicate ? It is not an alternate, right?
Actually it is an alternate, but only partially.

There is a table on the github page with the results from all alternatives.

Look at section "Character Variats" on https://github.com/be5invis/Iosevka
With fonts like that we might end up in issues anyway:

\definefontfeature[default:test][default][mlxx=yes,wflm=yes]
\definedfont[file:iosevka.ttc(Iosevka)*default:test] :> <>

e.g.

WFLM    Wolfram Language (Mathematica)

so we get font specific 4 char feature names that themselves have script / language specifications (like latin default and cyrillic serbian wolfram) ... these could have been ss* features (after all, cv and ss are wildcards and opentype has never been that consistent), not that it matters much because it gets processed anyway, but it's a clear signal that anyone can roll out adn use any feature name

Hans

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