rubyelement, either immediately before or immediately after an
rp element can be used to provide parentheses around a ruby text component of a ruby annotation, to be shown by user agents that don't support ruby annotations.
rp element represents nothing.
The example above, in which each ideograph in the text 漢字 is annotated with its phonetic reading, could be expanded to use
rp so that in legacy user agents the readings are in parentheses:
... <ruby> 漢 <rp>(</rp><rt>かん</rt><rp>)</rp> 字 <rp>(</rp><rt>じ</rt><rp>)</rp> </ruby> ...
In conforming user agents the rendering would be as above, but in user agents that do not support ruby, the rendering would be:
... 漢 (かん) 字 (じ) ...