What is correct rich snippet microdata for an Event?

I'm trying to implement microdata for events on my site. When I use the Google Rich Snippet Testing开发者_如何学Python tool I keep getting the error "Insufficient data to generate the preview".

Does anybody know of a definitive list of what data they want?

Is this stuff just too buggy to be spending time implementing now? My goal is to get better SEO results.

Thanks

This :

<div>
<a href="http://www.example.com/events/spinaltap">Spinal Tap</a>
<img src="spinal_tap.jpg" />

After their highly-publicized search for a new drummer,
Spinal Tap kicks off their latest comeback tour with a San
Francisco show.

When: Oct 15, 7:00PM—9:00PM

Where: Warfield Theatre, 982 Market St, San Francisco, CA

Category: Concert

</div>

Would become :

<div itemscope itemtype="http://data-vocabulary.org/Event">
  <a href="http://www.example.com/events/spinaltap" itemprop="url" >

    <span itemprop="summary">Spinal Tap</span>

  </a>
   <img itemprop="photo" src="spinal_tap.jpg" />

  <span itemprop="description">After their highly-publicized search for a new drummer,
   Spinal Tap kicks off their latest comeback tour with a San
   Francisco show.</span>

  When:
  <time itemprop="startDate" datetime="2015-10-15T19:00-08:00">Oct 15, 7:00PM</time>—
  <time itemprop="endDate" datetime="2015-10-15T19:00-08:00">Oct 15, 9:00PM</time>

  Where:

    <span itemprop="location" itemscope itemtype="http://data-vocabulary.org/​Organization">

    <span itemprop="name">Warfield Theatre</span>

     <span itemprop="address" itemscope itemtype="http://data-vocabulary.org/Address">

         <span itemprop="street-address">982 Market St</span>, 

         <span itemprop="locality">San Francisco</span>, 

         <span itemprop="region">CA</span>

     </span>

     <span itemprop="geo" itemscope itemtype="http://data-vocabulary.org/​Geo">
        <meta itemprop="latitude" content="37.774929" />
        <meta itemprop="longitude" content="-122.419416" />
     </span>
  </span>

  Category: <span itemprop="eventType">Concert</span> 
</div>

Just make sur you html works in a similar way.

Even with a well formatted page with schema.org markup, I've found that Google still relies on some of their older snippet requirements. You can find these requirements for Events at http://support.google.com/webmasters/bin/answer.py?hl=en&answer=164506&topic=1088474&ctx=topic . Scroll down to the "Properties" heading and you'll see some marked in bold. Make sure your markup includes those properties

This is a pretty simple example:

<div itemscope itemtype="http://schema.org/Event">
  <a itemprop="url" href="nba-miami-philidelphia-game3.html">
  NBA Eastern Conference First Round Playoff Tickets:
  <span itemprop="name"> Miami Heat at Philadelphia 76ers - Game 3 (Home Game 1) </span>
  </a>
  <meta itemprop="startDate" content="2016-04-21T20:00">
    Thu, 04/21/16
    8:00 p.m.
  <div itemprop="location" itemscope itemtype="http://schema.org/Place">
    <a itemprop="url" href="wells-fargo-center.html">
    Wells Fargo Center
    </a>
    <div itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
      <span itemprop="addressLocality">Philadelphia</span>,
      <span itemprop="addressRegion">PA</span>
    </div>
  </div>
  <div itemprop="offers" itemscope itemtype="http://schema.org/AggregateOffer">
    Priced from: <span itemprop="lowPrice">$35</span>
    <span itemprop="offerCount">1938</span> tickets left
  </div>
</div>

For more details and examples go here http://schema.org/Event , scroll to "Examples", select "Microdata".