RDFa (source lint)

<div xmlns:v="http://rdf.data-vocabulary.org/#" typeof="v:Review-aggregate">
   <span property="v:itemreviewed">L’Amourita Pizza</span>
   <img src="pizza.jpg" rel="v:photo">
   <span rel="v:rating">
      <span typeof="v:Rating">
         <span property="v:average">9</span>
         out of 
         <span property="v:best">10</span>
      </span>
   </span>
   based on 
   <span property="v:votes">24</span> ratings. 
   <span property="v:count">5</span> user reviews
</div>

Microdata (source lint)

<div itemscope itemtype="http://data-vocabulary.org/Review-aggregate">
  <span itemprop="itemreviewed">L’Amourita Pizza</span>
  <img itemprop="photo" src="pizza.jpg">
  <span itemprop="rating" itemscope itemtype="http://data-vocabulary.org/Rating">
    <span itemprop="average">9</span>
    out of <span itemprop="best">10</span>
  </span>
  based on <span itemprop="votes">24</span> ratings.
  <span itemprop="count">5</span> user reviews.
</div>