[css-align] Confusing Positional alignment values 'left' / 'right'

Hi everyone,

It was pointed out to me that 'left' / 'right' [1] in the Box
Alignment specification are not the physical directions but refer to
the line-relative ones, resp. line-left / line-right. AFAICT these are
new values in CSS Box Alignment, thus they could use the line-relative
values from writing-mode [2] to prevent this confusion. Did I miss
anything?

Thanks,
Julien

[1] http://dev.w3.org/csswg/css-align/#positional-values
[2] http://dev.w3.org/csswg/css-writing-modes-3/#line-directions