<http://schema.org/primaryImageOfPage>
"http://media.treehugger.com/assets/images/2011/10/gift-guide-media-junkies-550x550.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/slideshows/gift-guides/green-gift-guide-media-junkies/>