rel="bookmark" on an <a> tag.
This link represents a permalink to the article above it.
<article> The time in Arles, France became one of Van Gogh's more prolific periods: he completed 200 paintings and more than 100 drawings and watercolors. He was enchanted by the local countryside and light; his works from this period are rich in yellow, ultramarine, and mauve.<br /> Permalink: <a rel="bookmark" href="/html/rel/bookmark" target="_blank">Van Gogh #</a> </article>
The rel attribute defines the relationship between the current page and the linked page or resource.
rel="bookmark" value specifies the permalink (permanent URL) used for bookmarking.
A title value can be added to provide a title to the bookmark link.
<tagname rel="bookmark" />
These elements accept the bookmark value on the rel attribute.
|<a>||Specifies an anchor link -- see example above|
|<area>||Creates clickable areas inside an image map.|
Here is when rel support started for each browser: