cara edit Rich Snippet

<div vocab="http://schema.org/" typeof="Article">  <h2 property="name"> Article </h2>
  <div property="description">Tulis Deskripsi blog di sini.</div>
  <div property="aggregateRating" typeof="AggregateRating">
    <div>Article rating:      <span property="ratingValue">9</span>
      <meta property="bestRating" content="10"/>
      <meta property="worstRating" content="1"/>
      based on <span property="ratingCount">20</span> ratings
    </div>
  </div>
</div>