<http://schema.org/description>
"One of the new features we saw when OS X Lion launched back in July was a small but significant change to the scrollbars. The system default is now to keep them hidden out of sight, ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2012/01/11/this-app-lets-you-customize-scrollbar-behaviour-in-os-x-lion/>