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Re: [csswg-drafts] [css-fonts] font-variant-numeric: diagonal-fractions, in most fonts, doesn't work with semantic markup (#5756)

From: Chris Lilley via GitHub <sysbot+gh@w3.org>
Date: Thu, 03 Dec 2020 13:18:47 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-737987054-1607001526-sysbot+gh@w3.org>
> That Ubuntu Mono and similar fonts are out of compliance

The documentation in the OpenType specification for this feature is sufficiently brief and vague that such fonts are probably not out of compliance. There is an illustrative example of a non-standard fraction (ie not one which is separately encoded in Unicode)  but that is all.

CSS Fonts 4 does at least give an example of an integer followed by a fraction, which raises a slightly higher bar by example.

A good place to discuss improving the OpenType specification would be the [Font and Text CG](https://www.w3.org/community/font-text/)

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