<http://schema.org/description>
"Twitter now notifies users when someone favorites a tweet they were mentioned in. Yes, this may seem like a minor change, but it expands Twitter's existing notification system and gives ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2013/06/23/twitter-expands-notifications-now-alerts-you-when-someone-favorites-a-tweet-you-were-mentioned-in/?fromcat=all>