PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The preferred definitions of R1 are hydrogen, C1 -C4 alkyl, --OH, C6 -C12 alkoxy, C5 -C8 cycloalkoxy, allyl, benzyl, acetyl and 2-hydroxyethyl, in particular hydrogen and methyl.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com