[csswg-drafts] [css-fonts-4] Fonts may have their own internal mapping of keyword names to values

litherum has just created a new issue for 
https://github.com/w3c/csswg-drafts:

== [css-fonts-4] Fonts may have their own internal mapping of keyword 
names to values ==
Variation fonts may have their own internal mappings of keyword names 
to values. For example, a font may state that "condensed" may 
correspond to a "wght" axis value of "78.2".

CSS may want to have an explicit table of mappings for keywords to 
values for font-weight, font-stretch, and font-style.

Alternatively, the spec might benefit if the font file is consulted 
instead. Doing this would separate the notion of a keyword from the 
notion of a value (so, for font fallback, a keyword might be applied 
as a different value in two fonts used in the same element).

Please view or discuss this issue at 
https://github.com/w3c/csswg-drafts/issues/518 using your GitHub 
account