<rp> - HTML 5

The <rp> tag can be used to provide parentheses around a ruby text, to 
be shown by browsers that do not support ruby annotations.
Use the <rp> tag together with the <ruby> and the 
<rt> tags: The <ruby> element consists of one or more characters that needs an 
explanation/pronunciation, and an <rt> element that gives that information, and 
an optional <rp> element that defines what to show for browsers that not support ruby annotations.

Syntax

    <ruby>	漢 <rt><rp>(</rp>ㄏㄢˋ<rp>)</rp></rt>	</ruby>

Example

    <ruby>	漢 <rt><rp>(</rp>ㄏㄢˋ<rp>)</rp></rt>	</ruby>

Output / Return Value

Limitations

Alternatives / See Also

Reference