PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The mass density (or just density) of a material is defined as mass per unit volume and is expressed in grams per cubic centimeter (g/cm3).[15] In all three classic states of matter ??? gas, liquid, or solid ??? the density varies with a change in temperature or pressure, and gases are the most susceptible to those changes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org