PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???There is an urgent need to create policy structures that support the sound management of chemicals in developing countries,??? says Massey. ???A wide variety of toxic chemicals ??? including toxic metals such as lead, mercury and cadmium ??? are being used in developing countries with little or no regulation to protect human health and the environment.???
http://www.w3.org/ns/prov#wasQuotedFrom
  • uml.edu