<html>
<body>
<ruby>
<rb>漢</rb> <rp>(</rp><rt>Kan</rt><rp>)</rp>
<rb>字</rb> <rp>(</rp><rt>ji</rt><rp>)</rp>
</ruby>
<ruby>
<rb>02</rb> <rt>Month</rt>
<rb>08</rb> <rt>Day</rt>
<rb>1973</rb> <rt>Year</rt>
</ruby>
<ruby>
<rbc>
<rb>10</rb>
<rb>31</rb>
<rb>2002</rb>
</rbc>
<rtc>
<rt>Month</rt>
<rt>Day</rt>
<rt>Year</rt>
</rtc>
<rtc>
<rt rbspan="3">Date</rt>
</rtc>
</ruby>
</body>
</html>
The rtc element is a container for rt elements when the markup is complex. There should be only one rtc element inside a ruby container.
Ruby characters are small symbols placed next to text (typically Chinese, Japanese and Korean) to clarify pronunciation. The text to be annotated is the ruby base and the annotation is the ruby text.
A live example:
N of