PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As you suggest, though, the only person you can force to pay is probably your first customer, if you include the source with the product itself only - every customer is a potential competitor who may legitimately undercut you by giving away your product for free.
http://www.w3.org/ns/prov#wasQuotedFrom
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