PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • DKIM does not tell you anything about whether a message is spam or not (although it is a bit more work to set up, there is plenty of spam that is signed with a valid DKIM signature).
http://www.w3.org/ns/prov#wasQuotedFrom
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