title: schema.org: aggregateRating different notations
body: <p>I found different notations for aggregateRating on the internet.</p>
  <p>Can somebody please explain the difference between the following two?</p>
  <p><strong>Notation 1</strong></p>
  <pre><code>&lt;span itemprop=&quot;aggregateRating&quot; itemscope itemtype=&quot;https://schema.org/AggregateRating&quot;&gt;
  </code></pre>
  <p><strong>Notation 2</strong></p>
  <pre><code>&lt;span property=&quot;aggregateRating&quot; typeof=&quot;AggregateRating&quot;&gt;
  </code></pre>