[jQuery] How to dynamically add a rel="mylink"?

[Eric]

I understand how to add a class to existing href tags, for example

$("a").addClass("myclass");

I would also like to be able to add a 'rel' attribute to the href
tags, dynamically using jQuery.

For example, my html would have existing:

<a href="somelink">....</a>

The jQuery then adds "myclass" but I also want to add a
rel="myotherlink" too, so I would have a result:

<a href="somelink" class="myclass" rel="myotherlink">...</a>

I would like to avoid directing adding rel="myotherlink" into the html
href tags, if at all possible.

Thanks!