PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • history of drug abuse in the last 90 days, being defined as any use of an illicit substance, or use of a prescription or over the counter medication for reasons or in amounts, other than instructed use. (caffeine and nicotine are not exclusionary)
http://www.w3.org/ns/prov#wasQuotedFrom
  • clinicaltrials.gov