Support "Ruby Annotation -- W3C Working Draft 17 December 1999" which looks something like: <ruby> <rb>WWW</rb> <rp>(</rp><rt>World Wide Web</rt><rp>)</rp> </ruby>
Support "Ruby Annotation -- W3C Working Draft 17 December 1999" which looks (</rp>< rt>World Wide Web</rt><rp>)</rp>
something like:
<ruby>
<rb>WWW</rb>
<rp>
</ruby>