<http://schema.org/description>
"Earlier today, Twitter announced that it would be supporting Mozilla Firefox's Do Not Track mode in an effort to honor users privacy. Now, it has posted a new help document that clarifies ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2012/05/17/twitter-will-honor-do-not-track-in-all-supported-browsers-including-ie9-safari-5-1-and-firefox/>