title: Marking up a bottle of wine with Schema.org and Good Relations Product
body: <p>I have tried to mark up the kind of information you'd offer when you're selling a premium wine, here's what it looks like: <a href="http://www.google.com/webmasters/tools/richsnippets?url=dekoninck.co.uk/wine.html" rel="nofollow">http://www.google.com/webmasters/tools/richsnippets?url=dekoninck.co.uk%2Fwine.html</a>.</p>
  
  <p>The Rich Snippets Tools is showing "<em>Warning: Incomplete microdata with schema.org.</em>, and I can't work out what's missing.</p>
  
  <p>Also, I'd love recommendations on</p>
  
  <ul>
  <li>the best way to mark up grape variety; currently done via <code>additionalType</code></li>
  <li>the best way to mark up region; currently done via <code>additionalType</code></li>
  <li>the best way to mark up producer; currently done via <code>manufacturer</code> which feels clunky</li>
  <li>the best way to specify vintage; currently done via <code>releaseDate</code> which feels clunky</li>
  <li>the best way to specify offering storage for wine; currently done via <code>businessFunction http://purl.org/goodrelations/v1#Maintain</code></li>
  <li>how I can specify VAT/tax in pricing, for storage, wine price and delivery price.</li>
  </ul>