Background info: Furigana; Ruby character#HTML markup.
Words annotated with HTML ruby are not searchable in a user-friendly way when HTML formatting is stripped, as the reading becomes inline by default. For example, annotated
| To | kyo |
| 東 | 京 |
becomes inline 東(To)京(kyo), so neither searching for 東京 nor Tokyo would work.
( example of searching for HTML-formatted ruby as proof that this is a problem, another example )
So, this looks like what happens is you have the html structure:
some
<ruby>
<span>stuff</span>
<rp>(</rp><rt>superscript</rt><rp>)</rp>
</ruby>
using rubyTo create the content for the page, we strip out all the html tags and leave the remaining text, this means that converts into
some stuff(superscript) using ruby
instead of the expected
some stuff using ruby
This example isn't really perfect, because the superscript could be over a single symbol which isn't an entire word, meaning the word itself gets split up in the search.
I don't have any great suggestions for a solution, the simple method would be to rip out everything in the <rt> and <rp> tags, but that would prevent searching for that of course.