[selectors-4] "Grid-Structural Selectors" needs clarity as to whether it applies to tables only, or also to CSS Grid (display: grid)

[MaximSagan]

https://drafts.csswg.org/selectors-4/#table-pseudos

Use of the term "grid" suggests we may be dealing with CSS Grid, but all examples deal with <table> and its children.
If these selectors do apply to CSS Grid, the spec should probably complement the :nth-col pseudo-selector with a corresponding :nth-row pseudo-selector (see #1943).

Additionally, if these selectors apply to CSS grid, as the content and structure of CSS Grid rows/columns are defined by the CSS rather than by markup (which is the case for <table>), there are cyclic issues that may need consideration.

[Loirooriol]

Column membership is determined based on the semantics of the document language only: whether and how the elements are presented is not considered

makes it clear that CSS styles (including grid layout) are not considered, only the HTML (or whatever the document language) matters.

[tabatkins]

Yup, @Loirooriol got it.