<http://schema.org/description>
"City Tours is one of the many projects bubbling away in Google's Labs and it's just received an update that makes the service much more customisable - but is it any good?\r\n\r\nCity Tours ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2009/12/29/google-city-tours-updated-tourguide/>