@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:member . skos:related . skos:related . skos:narrower . skos:related . skos:related . skos:narrower . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:related . skos:altLabel "" ; skos:broader ; skos:definition "A correction has been made to the data for light source deterioration using a procedure that results in a zero value in pure water, rather than a zero value in air (which would give a value in pure water of around 0.36)."@en ; skos:notation "SDN:S05::S050078" ; skos:note "accepted"@en ; skos:prefLabel "calibration to read zero in clear water"@en ; skos:related , , , , , , , , , , , , . skos:related .