Help:Reviewing
From source code,code examples
How to Review Article
The discussion tab (at the top of the page) is for logging reviews, making comments about the content, etc. Each article has a discussion page. To quickly add your comments about a page, click "discussion" then click "add comment" (this only shows when you're looking at the discussion tab).
We are developing a system to add ratings to reviews, which will soon be accessible on the discussion tab.

