<http://schema.org/image>
<http://rack.1.mshcdn.com/media/ZgkyMDEzLzA4LzI2Lzg0L2Vjb21tZXJjZWRhLmJhZmMyLmpwZwpwCXRodW1iCTEyMDB4NjI3IwplCWpwZw/0d386510/940/ecommerce-data-sets.jpg>
<http://mashable.com/2013/08/26/9-data-sets-every-e-commerce-company-should-measure/>