Please note this code:<html itemscope itemtype=http://schema.org/WebPage><head>  <meta itemprop=name content=webpage/></head><body>  <div itemprop=mainContentOfPage itemscope itemtype=http://schema.org/Article>    <span itemprop=aggregateRating itemscope= itemtype=http://schema.org/AggregateRating>      <meta itemprop=ratingValue content=4>      <meta itemprop=worstRating content=0>        <meta itemprop=bestRating content=5>                        <meta itemprop=ratingCount content=100>    </span>  </div>      </body></html>If I add an AggregateRating inside the div tag for article, Google Labs does not show the values of AggregateRating on its URL result So I must remove itemprop=mainContentOfPage or add AggregateRating out of the div tag or add both.How can I fix this problem?AggregateRating belongs to AggregateRating, not WebPage!?For a solution I changed the code to this:<html itemscope itemtype=http://schema.org/WebPage><head>  <meta itemprop=name content=webpage/></head><body>  <span itemprop=aggregateRating itemscope= itemtype=http://schema.org/AggregateRating>      <meta itemprop=ratingValue content=4>      <meta itemprop=worstRating content=0>        <meta itemprop=bestRating content=5>                        <meta itemprop=ratingCount content=100>    </span>  <div itemprop=about mainContentOfPage itemscope itemtype=http://schema.org/Article>    <span itemprop=aggregateRating itemscope= itemtype=http://schema.org/AggregateRating>      <meta itemprop=ratingValue content=4>      <meta itemprop=worstRating content=0>        <meta itemprop=bestRating content=5>                        <meta itemprop=ratingCount content=100>    </span>  </div>      </body></html>But I'm not sure it's true or not!
Issue with result of Microdata schema.org in Google Labs
microdata