title: Does "description" in Schema.org markup have to be free of HTML tags?
body: <p>All e-commerce websites with <code>Product</code> Schema.org Microdata that I found use plain text in <code>description</code> property. </p>
  
  <p>Is there some specification that clearly prohibits markup with some text formatting tags like:</p>
  
  <pre><code>&lt;div itemscope itemtype="http://schema.org/Product"&gt;
  &lt;meta itemprop="name" content="Name" /&gt;
  &lt;meta itemprop="description" content="&lt;p&gt;First paragraph with &lt;b&gt;bold words&lt;b/&gt;.&lt;/p&gt;&lt;p&gt;Second paragraph.&lt;/p&gt;" /&gt;
  &lt;/div&gt;
  </code></pre>