<http://schema.org/description>
"Twitter CEO Dick Costolo has promised in recent months that an option for users to download an archive of all the tweets from their accounts would be available this year. At least for ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2012/12/16/twitter-has-started-rolling-out-the-option-to-download-all-your-tweets/?fromcat=all>