You can publish the module to the pages of want on your website (some pages or all of them), it will show you the Schema optimized breadcrumbs. The version 1.0 of this module lists Schema rich snippets for the Joomla articles, Community Builder users and Virtuemart products, but the list will be updated for other Joomla extensions as well in the next versions.
Also, you can rate any article on a website, any CB users and any Virtuemart products with rates from 1 to 5 stars. The Schema.org rules also apply to the voting form and results.
The version 1.1 was added the option "Tell a friend", using that you can send the URL of the article, CB user and product by mail to multiple email addresses. It contains a capcha code in order to stop bots using your system to send spam emails.
The module works on Joomla 1.5, 1.6, 1.7, 2.5 and 3x.
By cons a little hard to navigate on their website for those who do not speak Romanian as google can not translate everything