article-types:erratum leaf node

@prefix article-types: <http://ns.nature.com/article-types/> .
@prefix npg: <http://ns.nature.com/terms/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

article-types:erratum a npg:ArticleType,
        skos:Concept ;
    npg:hasRoot article-types:research-and-reviews ;
    npg:id "erratum" ;
    npg:isLeaf false ;
    npg:isRoot false ;
    npg:treeDepth 2 ;
    rdfs:isDefinedBy article-types: ;
    skos:broader article-types:amendments-and-corrections ;
    skos:definition "The :erratum article-type denotes a notification of an important error made by the journal that affects the publication record or the scientific integrity of the paper, or the reputation of the authors, or of the journal."@en ;
    skos:inScheme article-types: ;
    skos:prefLabel "Erratum"@en .