is in scheme This is used to link a particular concept, defined as the subject for the resource under consideration, to the scheme (i.e., an individual of `skos:ConceptScheme`) that defines it. Instead of creating a new concept scheme every time, one could reuse concept schemes already available in existing SKOS-based models. :my-concept skos:inScheme :my-scheme . :my-scheme a skos:ConceptScheme ; skos:prefLabel "Dewey Decimal Classification"@en . A concept scheme in which a concept is included.