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In the section "1.3 Column and row header cells" bad html advice is being given. Proper html and proper accessibility guidelines state that you never use ! alone in the middle of a table to show a header. "! rowheader1" is wrong. If you must show a header midtable it must contain the scope="row" statement. It can cause errors in older screen readers and is not proper html. This should be changed. Fyunck(click) (talk) 06:30, 14 October 2022 (UTC)[reply]
Accessibility guidelines have been added in various places. Jroberson108 (talk) 03:39, 13 December 2023 (UTC)[reply]