Some wiki engines offer markup for superscript and subscript text.
Superscript#
Superscripted textCreole: ^^This is superscripted text^^
Proposed XHTML: <sup> </sup>
Comparsion: http://www.wikimatrix.org/syntax.php?i=28
Subscript#
Subscripted textCreole: ~~This is subscripted text~~
Proposed XHTML: <sub> </sub>
Comparsion on wikimatrix: http://www.wikimatrix.org/syntax.php?i=29
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