<http://schema.org/description>
"Here is a cute little tip on how to automatically tweet useful links and tidbits of extra information during your presentation. It will make you look innovative, and get you a bunch ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/lifehacks/2011/04/22/how-to-auto-tweet-during-your-keynote/>