PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For example, going from reading E-Mail # 1 to reading E-Mail # 2 is presumably an example of context switching, but the cost there could conceivably be very small, especially if both e-mails were on the same topic.
http://www.w3.org/ns/prov#wasQuotedFrom
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