concept scheme :my-concept-scheme a skos:ConceptScheme ; dcterms:title 'Semantic Web Technologies'@en ; dcterms:creator :john-doe ; skos:hasTopConcept :semantic-web ; dcterms:description 'An organized set of concepts.'@en . Semantic relationships (links) between those concepts may also be viewed as part of a concept scheme. This definition is, however, meant to be suggestive rather than restrictive, and there is some flexibility in the formal data model. The notion of a concept scheme is useful when dealing with data from an unknown source, and when dealing with data that describes two or more different knowledge organization systems. A SKOS concept scheme can be viewed as an aggregation of one or more SKOS concepts.