PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The most important of these ions are sodium (Na+), potassium (K+), calcium (Ca2+), and chloride (Cl???).
http://www.w3.org/ns/prov#wasQuotedFrom
  • nih.gov