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<html lang="ja" xmlns="http://www.w3.org/1999/xhtml">
<meta charset="utf-8"/>
<title>Reference: :root element with 'display:ruby'.</title>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com"/>
<style>
rbc {
  display: ruby-base-container;
}
rtc {
  display: ruby-text-container;
}
</style>
<ruby>べ
<rtc>
  <rt>る</rt>
</rtc>
<rbc>
  <rb>A</rb>
  <rb>B</rb>
</rbc>

<pre>block ruby, </pre>
</ruby></html>