@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://opda.org.uk/pdtf/SubstanceKindCategory> a skos:Concept ;
    skos:prefLabel "Substance Kind" ;
    skos:definition "A rigid sortal (OntoClean +R, +O) that supplies its own principle of identity — instances are necessarily of this type, and it carries an identity criterion its instances inherit." ;
    skos:inScheme <https://opda.org.uk/pdtf/UFOCategoryScheme> ;
    dct:source <https://opda.org.uk/pdtf/harness/odr/ODR-0031> .