[css-values] Definition of 2D Positioning: the <position> type

[lahmatiy]

The latest version of CSS Backgrounds and Borders Module Level 3 has changed definition of <bg-layer> and <final-bg-layer> to use <bg-position> instead of <position>. I did a little research into the difference and found that CSS Values and Units Module Level 4 has its own syntax of <position> with notes:

Note: The background-position property also accepts a three-value syntax. This has been disallowed generically because it creates parsing ambiguities when combined with other length or percentage components in a property value.

It's good to know. But there are a couple of problems:

• CSS Values and Units Module Level 4 (WD) – doesn't reflect changes about <position> in Changes section
• CSS Values and Units Module Level 3 (CR) – still refers to CSS Backgrounds and Borders Module Level 3 with no notes about the difference

I believe it should fixed in one way or another to be less confused: add a notes to <position> section and an entry to Changes section to L3, or add an entry to Changes section in L4.

[fantasai]

Afaict, css-values-3 and css-values-4 have identical text, which defines a syntax and defers interpretation to css3-background, which defines a superset of said syntax. So I don't see a problem.

As css-values-4 is a new spec, its changes section will consist only of differences from css-values-3 upon publication of FPWD.

Closing as invalid.

[lahmatiy]

Afaict, css-values-3 and css-values-4 have identical text

No, they are not identical or I'm looking wrong urls.

CSS Values and Units Module Level 3 (CR)

https://www.w3.org/TR/css-values-3/#position
https://www.w3.org/TR/css-values/#position

CSS Values and Units Module Level 4 (WD)

https://drafts.csswg.org/css-values/#position

[fantasai]

https://drafts.csswg.org/css-values-3/

I've been trying to get the copy on www.w3.org updated since August, but the CSSWG was really dragging its heels on #434 . I checked in the edits last night, though, so assuming I get approval next Wednesday, we should be able to publish in 2 weeks. (CR updates take a long time, unfortunately. 🙁 )