@prefix sampledescriptionvocabulary1: <https://purls.helmholtz-metadaten.de/skosmos/sdv/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

sampledescriptionvocabulary1:Reference
  skos:prefLabel "Reference" ;
  skos:narrower sampledescriptionvocabulary1:SpatialReference, sampledescriptionvocabulary1:GeometricalReference ;
  skos:broader sampledescriptionvocabulary1:PhysicalSystem ;
  a skos:Concept .

sampledescriptionvocabulary1:SpatialReference
  skos:prefLabel "Spatial reference" ;
  a skos:Concept ;
  skos:broader sampledescriptionvocabulary1:Reference .

sampledescriptionvocabulary1:PhysicalSystem
  skos:prefLabel "Physical system" ;
  a skos:Concept ;
  skos:narrower sampledescriptionvocabulary1:Reference .