<http://schema.org/description>
"If you've ever been typing an email and after sending it you've realized that you've forgotten someone, you know that sinking feeling. Worse yet, what if you meant to email Bobbi but ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2011/04/13/gmail-gets-smarter-with-recipient-suggestions/>