title: Open Graph product schema enum property values
body: <p>I would like to know what are the <strong>allowed values for the Open Graph <code>og:product</code> type, <code>og:availability</code> property</strong>. It is defined as an enum property (see <a href="http://graph.facebook.com/schema/og/product#availability" rel="nofollow">http://graph.facebook.com/schema/og/product#availability</a>).</p>
  
  <p>I have struggled for a while trying to make Open Graph product tags work according to Pinterest Rich Pins specification without any success. (see <a href="http://developers.pinterest.com/rich_pins/" rel="nofollow">http://developers.pinterest.com/rich_pins/</a> -> Open Graph -> availability). The example there works fine, both Facebook and Pinterest debuggers parse it correctly.</p>
  
  <pre><code>&lt;meta property="og:availability" content="instock" /&gt;
  </code></pre>
  
  <p>But if this value is changed by any of the ones which are described in the Rich Pins documentation (in stock", "preorder", "backorder", "out of stock", "discontinued"). Both Facebook and Pinterest debuggers fail to parse the content of this <code>og:availability</code> property.</p>
  
  <p>Also the documented value documented in Rich Pins for the meta tag property looks wrong to me but <code>og:availability</code> and <code>product:availability</code> are valid ones</p>