@prefix envthes: <http://vocabs.lter-europe.net/EnvThes/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .

envthes:
  skos:prefLabel "EnvThes"@en ;
  a skos:ConceptScheme .

envthes:21540
  skos:inScheme envthes: ;
  a skos:Concept ;
  skos:altLabel "T-1"@en ;
  skos:exactMatch <http://sweet.jpl.nasa.gov/2.3/propTimeFrequency.owl#Frequency>, <http://www.qudt.org/qudt/owl/1.0.0/quantity/Instances.html#Frequency> ;
  skos:definition "[SWEET] The rate of recurrence of any periodic phenomenon, often associated with waves of all kinds. Without qualification frequency often means temporal frequency, the rate of recurrence of a time-varying function, but could mean spatial frequency, the rate of recurrence of a space-varying function. Spatial frequency is the reciprocal of the repeat distance (sometimes the wavelength). The dimensions of (temporal) frequency are inverse time. A common unit for frequency is cycle per second, formerly abbreviated cps, but superseded by hertz, abbreviated as Hz."@en ;
  skos:broader envthes:21463 ;
  skos:prefLabel "frequency"@en ;
  dc:creator "herbert.schentz@umweltbundesamt.at"@en .

envthes:21463
  skos:prefLabel "derived property"@en ;
  a skos:Concept ;
  skos:narrower envthes:21540 .