<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.digitalspy.com/tech/apple/news/a385397/apple-bringing-siri-voice-assistant-to-ipad-with-ios-6-say-sources/>