PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • There are still areas (especially rural ones) where wells are either not tested or regulated under the federal law, or where we know there is contamination such as from nitrates ??? a common problem where there is heavy fertilized agricultural activities, confined animal feeding operations, or leaking cesspools/septic tanks.
http://www.w3.org/ns/prov#wasQuotedFrom
  • scienceblogs.com