<http://schema.org/description>
"An enhancement to the Mac OS X operating system under development by Apple looks to pave the way for active desktop pictures, or desktop backgrounds that can include motion graphics and alter themselves based on user actions or the time of the day."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/07/04/19/apple_developing_active_desktop_feature_for_mac_os_x.html>