PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • it is not a good idea to use in layouts images that are linked from external servers (such as from ECWP servers, OGC WMS servers or TerraServer servers) because such images are downloaded as necessary to fill a particular view at a given zoom level and pan.
http://www.w3.org/ns/prov#wasQuotedFrom
  • georeference.org