After reading up on the CommentAPI, if I were to write the RatingAPI, I’d pretty much plagiarize the CommentAPI but only make the following changes:

Remove the title and link elements (they are unnecessary).

Change the html discovery to:

<link rel="service.rating" type="text/xml" href="url goes here"
title="Rating Interface" min="0" max="5"/>

Change the new comment element to a rating element:

<wfw:rating xmlns:wfw="">


What do you think?