@prefix dct: . @prefix ns1: . @prefix ns2: . @prefix ns3: . @prefix rdfs: . @prefix skos: . a skos:Concept ; dct:created "2019-01-14" ; dct:modified "2019-01-14" ; ns2:hasProfile ; ns3:status ; rdfs:seeAlso ; skos:definition "The trough is the lowest point of a wave. Trough depth is the vertical distance between the trough and the calm sea surface. Maximum trough depth is the maximum value measured during the observation period."@en ; skos:exactMatch ; skos:prefLabel "sea surface wave maximum trough depth"@en ; ns1:hadPrimarySource .