<http://schema.org/description>
"I haven't used Instant Messaging for anything significant in months. Why? Last May (!) I used the Twitter micro-blogging service and made a post every time I ... ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hanselman.com/blog/TwitterTheUselessfulnessOfMicroblogging.aspx>