@prefix mdl: <http://data.loterre.fr/ark:/67375/MDL> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

mdl: a skos:ConceptScheme .
mdl:-DDCLHP63-L
  skos:hiddenLabel "extreme high frequencies"@en, "extrêmes hautes fréquences"@fr, "Onde millimétriques"@fr, "Onde millimétrique"@fr, "Millimetric wave"@en, "ondes millimétriques"@fr, "millimetric waves"@en ;
  skos:definition "On appelle extrêmement haute fréquence (EHF), extremely high frequency en anglais, la bande de radiofréquences qui s'étend de 30 à 300 GHz (longueur d'onde de 1 cm à 1 mm). Les EHF font partie des micro-ondes. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/Extr%C3%AAmement_haute_fr%C3%A9quence\" target=\"_blank\">https://fr.wikipedia.org/wiki/Extr%C3%AAmement_haute_fr%C3%A9quence</a>)"@fr, "Extremely high frequency (EHF) is the International Telecommunication Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). It lies between the super high frequency band and the far infrared band, the lower part of which is the terahertz band. Radio waves in this band have wavelengths from ten to one millimetre, so it is also called the millimetre band and radiation in this band is called millimetre waves, sometimes abbreviated MMW or mmWave. Millimetre-length electromagnetic waves were first investigated by Indian physicist Jagadish Chandra Bose, who generated waves of frequency up to 60 GHz during experiments in 1894–1896. (Wikipedia, The Free Encyclopedia, <a href=\"https://en.wikipedia.org/wiki/Extremely_high_frequency\" target=\"_blank\">https://en.wikipedia.org/wiki/Extremely_high_frequency</a>)"@en ;
  skos:altLabel "extrême haute fréquence"@fr, "extreme high frequency"@en, "EHF"@fr, "EHF"@en ;
  skos:broader mdl:-N2JTH5BP-5 ;
  skos:inScheme mdl: ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Extremely_high_frequency>, <https://fr.wikipedia.org/wiki/Extr%C3%AAmement_haute_fr%C3%A9quence> ;
  a skos:Concept ;
  skos:prefLabel "millimetric wave"@en, "onde millimétrique"@fr .

mdl:-N2JTH5BP-5
  skos:prefLabel "onde radioélectrique"@fr, "radio wave"@en ;
  a skos:Concept ;
  skos:narrower mdl:-DDCLHP63-L .