This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
offset-position
will be written to mean do nothing to the position of the element.offset-path
as it’s only relevant when there’s an angle.vertical-align: baseline
means first baseline except for inline-blocks (due to CSS2.1 legacy)