<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzZiL3R3aXR0ZXJlbnZ5LmRsTi5wbmcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/c061ae6b/632/twitter-envy-facebook-adds-public-content-sharing-e31a2dded3.jpg>
<http://mashable.com/2009/06/24/facebook-publisher/>