<http://schema.org/description>
"British and U.S. retailers admitted that they were keeping track of shopper movement inside their stores by tracking signals from their cell phones."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/2013/07/15/Retailers-are-cloak-and-dagger-with-customers/UPI-81681373918174/?rel=88061373922761>