<http://schema.org/description>
"It's a strange game, comparing the relative size of websites. The pageview, once the key metric that ruled them all, is in decline as technology leaves it slowly in the dust, gripping ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/insider/2012/06/29/pinterest-bigger-than-tumblr-depends-who-you-ask-and-where-you-draw-the-line/>