Node type: Element (may contain text and/or other elements)
Whitespace: Not protected
Marks text that should be rendered in superscript format.
{textual content}
<para paraID="4">Superscript: e=mc<sup>2</sup>. Subscript: H<sub>2</sub>O.</para>
Superscript: e=mc2. Subscript: H2O.
Footnotes are tagged with noteMarker rather than sup.
Use the sup character style. To embed <sup> in another character style, apply the superscript character attribute directly.