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

mdl:-HSNSWSJK-V
  skos:exactMatch <https://www.daviddarling.info/encyclopedia/A/astrolabe.html>, <https://fr.wikipedia.org/wiki/Astrolabe> ;
  skos:related mdl:-TLX1V6DL-3 ;
  skos:hiddenLabel "astrolabes"@en, "astrolabes"@fr, "Astrolabe"@en, "Astrolabe"@fr ;
  skos:prefLabel "astrolabe"@fr, "astrolabe"@en ;
  skos:broader mdl:-J3WXV6VR-W ;
  skos:inScheme mdl: ;
  skos:definition "An astrolabe is an Arabic and medieval European sighting instrument on an altazimuth mounting, used to show the appearance of the celestial sphere at a given moment and to determine the elevation above the horizon of celestial objects. It comprises two or more flat, metal, calibrated disks, one with a star map and one or more others with a scale of angles around its rim, attached so that both or all can rotate independently; the modern equivalent is the planisphere. For early navigators and astronomers it served as star chart, compass, clock, and calendar. As a navigational device it was eventually replaced by the sextant.   (Encyclopedia of Science, by David Darling, <a href=\"https://www.daviddarling.info/encyclopedia/A/astrolabe.html\" target=\"_blank\">https://www.daviddarling.info/encyclopedia/A/astrolabe.html</a>)"@en, "L’astrolabe est un instrument astronomique d'observation et de calcul analogique. Instrument aux fonctions multiples, il permet notamment de mesurer la hauteur des étoiles, dont le soleil, et ainsi de déterminer l'heure de l'observation et la direction de l'astre. Sa conception, dont les origines grecques remontent à l'Antiquité, bien plus tard perfectionnée par les arabes, s'appuie sur une projection plane de la voûte céleste et de la sphère locale, dite projection stéréographique. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/Astrolabe\" target=\"_blank\">https://fr.wikipedia.org/wiki/Astrolabe</a>)"@fr ;
  a skos:Concept ;
  skos:narrower mdl:-VHCKQ9RT-Q .

mdl:-TLX1V6DL-3
  skos:prefLabel "astrometry"@en, "astrométrie"@fr ;
  a skos:Concept ;
  skos:related mdl:-HSNSWSJK-V .

mdl:-VHCKQ9RT-Q
  skos:prefLabel "astrolabe de Danjon"@fr, "Danjon astrolabe"@en ;
  a skos:Concept ;
  skos:broader mdl:-HSNSWSJK-V .

mdl:-J3WXV6VR-W
  skos:prefLabel "instrument d'astrométrie"@fr, "astrometric instrument"@en ;
  a skos:Concept ;
  skos:narrower mdl:-HSNSWSJK-V .

mdl: a skos:ConceptScheme .