PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Softness is a quality that does not lend itself to easy quantification J. D. Bates, in Softness Index: Fact or Mirage?, TAPPI, Vol. 48 (1965), No. 4, pp. 63A-64A, indicates that the two most important readily quantifiable properties for predicting perceived softness are (a) roughness and (b) what may be referred to as stiffness modulus.
http://www.w3.org/ns/prov#wasQuotedFrom
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