PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • <p>A note here that potential gaming of schema.org is not, of course, restricted to review data, but any data encoded in microdata.&nbsp; More "semspam will inevitably appear as Google (et al.) start to give more visibility to other types (whether in the form of rich snippets, improved rankings or other mechanisms).</p>
http://www.w3.org/ns/prov#wasQuotedFrom
  • moz.com