PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Always test pH at the same time each day to obtain a more accurate reading, since the pH naturally fluctuates during the day and night especially if plants are in the tank; this is termed the diurnal cycle.
http://www.w3.org/ns/prov#wasQuotedFrom
  • tropicalfishkeeping.com