Draft spec proposal:

https://github.com/w3c/aria/issues/667

In a spreadsheet, the columns are labeled A, B, C, D, etc. and not 1, 2, 3. The coordinates of the first cell are A1, not (1, 1).

ARIA should have a way to express this, and we propose aria-rowtext, aria-coltext on each cell to go with aria-rowindex and aria-colindex.

Cell A1
Cell B1
Cell A2
Cell B2

It's similar to the distinction between aria-valuenow and aria-valuetext - valuenow is the numerical value and valuetext is the string description. Here, aria-colindex is the numerical index and aria-coltext is the way to describe the column index.

Note that this is NOT the same as a column or row header, we couldn't just use a column or row header for this. In a spreadsheet, the column and row headers are PART of the spreadsheet and have their own row and cell index too.

We'll expose these only on Windows for experimental usage until we have a complete spec.