@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix quantitykind: <http://qudt.org/vocab/quantitykind/> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix soqk: <http://qudt.org/vocab/soqk/> .
@prefix sou: <http://qudt.org/vocab/sou/> .
@prefix vaem: <http://www.linkedmodel.org/schema/vaem#> .

soqk:Planck
  a qudt:SystemOfQuantityKinds ;
  qudt:hasQuantityKind quantitykind:Length ;
  rdfs:isDefinedBy <http://qudt.org/3.2.1/vocab/soqk> ;
  rdfs:label "Planck System of Quantities" .