I'm prepping the Values and Units draft for CR, and it occurred to me it might be useful to have you review this issue: https://lists.w3.org/Archives/Public/www-style/2016Mar/0298.html which was resolved here: https://lists.w3.org/Archives/Public/www-style/2016May/0209.html and resulted in this wording: https://lists.w3.org/Archives/Public/www-style/2016Jun/0029.html
Please let me know if you have any comments substantively or editorially. :) Thanks~ ~fantasai