[csswg-drafts] Pull Request: [css-fonts-4] Clarify range constraints on descriptor values in `<font-feature-value-type>`

cdoublev has just labeled a pull request from cdoublev for https://github.com/w3c/csswg-drafts as "css-fonts-4":

== [css-fonts-4] Clarify range constraints on descriptor values in `<font-feature-value-type>` ==
Fixes #9926.

Descriptor values in `<font-feature-value-type>` rules are currently defined with:

  > Each declaration’s value must match the grammar `<integer [0,∞]>+` [...]

https://drafts.csswg.org/css-fonts-4/#font-feature-values-syntax

As commented in the referenced issue, `[0,∞]` is not appropriate for all `<feature-value-name>`.

This PR makes use of `<feature-index>` but renamed to `<font-feature-index>`, which is similar to the suggestion to rename `<family-name>`, in order to avoid using generic production names for specific contexts. 

Similarly, `<feature-value-name>` is also renamed to `<font-feature-value-name>`.

See https://github.com/w3c/csswg-drafts/pull/13324


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Received on Saturday, 10 January 2026 05:00:19 UTC