PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Accordingly, we recommend that in distinguishing any top ads or other advertising results integrated into the natural search results, search engines should use: (1) more prominent shading that has a clear outline; (2) a prominent border that distinctly sets off advertising from the natural search results; or (3) both prominent shading and a border.
http://www.w3.org/ns/prov#wasQuotedFrom
  • jdsupra.com