<html>
<body>
<p>Novels of Philip K. Dick</p>
<ul>
<li><data value="978-0-547-57241-3">Valis</data></li>
<li><data value="978-0-547-57229-1">Ubik</data></li>
<li><data value="978-0-544-04889-8">Total Recall</data></li>
</ul>
</body>
</html>
The data element adds machine readable data to an element.
Not to be confused with HTML5 data attributes.
A live example:
Novels of Philip K. Dick
N of