<sup>

A superscript is text that is printed above the line. It is frequently used in chemical and mathematical formulas.

Rendering expectations

The content of the <sup> element is typically rendered higher in relationship to the surrounding text and in a smaller font.

Specialization hierarchy

The <sup> element is specialized from <ph>. It is defined in the highlighting-domain module.

Content model

(Text | <cite> | <include> | <keyword> | <ph> | <strong> | <em> | <b> | <i> | <line-through> | <overline> | <sup> | <sub> | <tt> | <u> | <q> | <term> | <text> | <tm> | <xref> | <data> | <sort-as> | <draft-comment> | <foreign> | <required-cleanup> )*

Attributes

The following attributes are available on this element: universal attributes and @keyref.

The following attributes are available on this element: universal attributes and the attributes defined below.

@keyref
Specifies a key name that acts as a redirectable reference based on a key definition within a map. See The keyref attribute for information on using this attribute.

Example

This section is non-normative.

The following code sample shows a <sup> element used to ensure proper formatting of the exponent in the number ten to the power of five:

<p>The power produced by the electrohydraulic dam was 10<sup>5</sup> more than 
the older electric plant.</p>