PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The button appeared beside weblinks as well as ads, and if you clicked on it, Google would then display a +1 icon on the same link when people you are connected to ??? via Google Chat, Google Contacts, or other services ??? ran searches of their own.It???s called +1 ??? the digital shorthand for 'this is pretty cool,' the company said.
http://www.w3.org/ns/prov#wasQuotedFrom
  • theregister.co.uk