The rb element isn't recognized on HTML5 mode

Hello,

I believe following HTML is valid (as W3C HTML 5.0), but the validator says 
"Element rb not allowed as child of element ruby in this context. (Suppressing 
further errors from this subtree.)".


<!DOCTYPE html>
<html>
<head>
<title>The rb element testing</title>
</head>
<body>
<p>
<ruby><rb>base<rt>annotation</ruby>



Best Regards,
NAKAMURA, momdo

Received on Wednesday, 13 May 2015 13:37:43 UTC