dcterms:dateCopyrighted leaf node

@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix vann: <http://purl.org/vocab/vann/> .
@prefix vs: <http://www.w3.org/2003/06/sw-vocab-status/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

dcterms:dateCopyrighted a owl:DatatypeProperty,
        owl:FunctionalProperty ;
    rdfs:label "has copyright date"@en ;
    vann:example """
        :my-journal-article a fabio:JournalArticle ;
            dcterms:dateCopyrighted '2026-04-28'^^xsd:date .
    """ ;
    rdfs:comment "The date on which a resource has been copyrighted."@en ;
    rdfs:isDefinedBy dcterms: ;
    rdfs:range xsd:date ;
    rdfs:subPropertyOf dcterms:date ;
    vs:term_status <http://purl.org/linked-data/registry#statusStable> .