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

sampledescriptionvocabulary1:DOI
  skos:prefLabel "DOI" ;
  skos:definition "1. A DOI is a digital identifier of an object, any object — physical, digital, or abstract. DOIs solve a common problem: keeping track of things. Things can be matter, material, content, or activities. (doi.org)  2. A digital object identifier (DOI) is a persistent identifier, or persistent handle, used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). (Wikipedia)"@en ;
  skos:broader sampledescriptionvocabulary1:SampleIDType ;
  a skos:Concept .

sampledescriptionvocabulary1:SampleIDType
  skos:prefLabel "Sample ID type" ;
  a skos:Concept ;
  skos:narrower sampledescriptionvocabulary1:DOI .