[whatwg] Ruby in HTML

Anne van Kesteren fora at annevankesteren.nl
Sun Jan 29 07:41:09 PST 2006

I did some testing in Internet Explorer with Ruby markup using the Live DOM
Viewer. Here are the results:

<ruby> element

This element is closed by </ruby> and <ruby>. This element is required as a
container. Otherwise the following elements have no "rendering semantics". Much
like with the <table> element.

Internet Explorer creates a mall-formed DOM for things like: "<ruby> <p>
<ruby>". Doing that you get:

 RUBY (1)
   RUBY (2)
 RUBY (2)

Where the second of (2) is red as they are identical... Putting another <p> at
the end gives you:

 RUBY (1)
   RUBY (2)
 RUBY (2)

This means that the previous <p> is not implicitly closed. I'm not sure if
that's desired.

<rb> element

This element is closed by any element. <x>, </y> you name it. It has no closing
tag and is entirely optional. See
<http://www.w3.org/TR/2001/REC-ruby-20010531/#compatibility>. Given that I'm
not sure if it is implemented in the first place.

<rt> element

This element is closed by </rt>, <rt>, </ruby> and <ruby>. Using </ruby> or
<ruby> also closes the parent <ruby> element of <rt>.

<rp> element

This element is closed by </rp>, <rp>, </rt>, <rt>, <ruby> and </ruby> Same as
with <rt>.

<rtc> element
<rbc> element

Both are unsupported and treated as unrecognized elements.

Anne van Kesteren

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