Subscript and superscript (subsup)

Scientific and mathematical expressions must be marked so that subscripts and superscripts are programmatically exposed—e.g. using <sub>/<sup> elements or equivalent semantic markup (such as MathML).


Incorrect sup usage:

This paragraph uses the <sup> element incorrectly/inappropriately:


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Note: Impossible to automatically test or detect. Requires a human tester or AI to determine if <sub> elements are used appropriately.

axe detected: none  |  QualWeb detected: none