has supplement The supplement relationship type involves works/expressions that are intended to be used in conjunction with another work/expression. Some of these, such as indices, concordances, teachers' guides, glosses, and instruction manuals for electronic resources will be so closely associated with the content of the related work/expression that they are useless without the other work/expression. :relation-dataset-article a datacite:QualifiedRelation ; datacite:hasRelationCharacterization frbr:supplement . An expression work/expression having another one as supplement. This is used in combination with [OWL2 punning](https://www.w3.org/TR/owl2-new-features/#F12:_Punning) to characterise the type of a relation ("IsSupplementedBy") as an instance of `datacite:QualifiedRelation` via the property `datacite:hasRelationCharacterization`.