[css-values] Expand “UA” abbreviation

[j9t]

Minor issue, just a suggestion: https://www.w3.org/TR/2018/WD-css-values-4-20181010/ speaks about “UAs” much of the document (starting in §2.3) without expanding the term; if anything then only in §6 and later is there mention of “user agents.” I suggest that for such abbreviations, the first mention is spelled out alongside its abbreviation, as with “user agents (UAs)” or such.

The suggestion is based on the idea that we’re well familiar with these abbreviations, but not everyone might.

[fantasai]

This makes sense, but, it seems like it'd be really hard to make sure we got it right for every spec, given UA doesn't appear in any of the early sections/boilerplate.

We do define the term in the CSS2 intro/glossary at
https://www.w3.org/TR/CSS2/conform.html#user-agent

And there is also a W3C Glossary, which should probably also define it
https://www.w3.org/2001/12/Glossary
But unfortunately it's not maintained so I filed an issue about that against the AB here:
https://github.com/w3c/AB-memberonly/issues/107

We also have an outstanding issue about incorporating CSS2 intro materials into the CSS Snapshot at https://www.w3.org/TR/CSS/ , which we should also get around to.

That still doesn't help much with discoverability though... :/

[fantasai]

@j9t OK, I've added a glossary to the CSS Snapshot at https://drafts.csswg.org/css-2022/#intro :) This will give us a place to cross-link “UA” to throughout all of our specs.

Thanks for filing this issue, we probably wouldn't have gotten around to it without your prompting.

[j9t]

Nice—thanks for looking into this!