http://purl.org/spar/fabio/Textbook leaf node

@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#> .

<http://purl.org/spar/fabio/Textbook> a owl:Class ;
    rdfs:label "textbook"@en ;
    vann:example """
        :my-text-book a fabio:TextBook ;
            dcterms:title 'Introduction to Meta-ontologies'@en ;
            frbr:realizationOf :my-instructional-work ;
            dcterms:description 'A book used as a standard source of information for the formal study of a particular subject.'@en .
    """ ;
    rdfs:comment "A book containing instructional material relating to a particular topic of academic study, designed to be read by students."@en ;
    rdfs:isDefinedBy <http://purl.org/spar/fabio/> ;
    rdfs:subClassOf [ a owl:Restriction ;
            owl:onProperty <http://purl.org/vocab/frbr/core#realizationOf> ;
            owl:someValuesFrom <http://purl.org/spar/fabio/InstructionalWork> ],
        <http://purl.org/spar/fabio/Book> ;
    vs:term_status <http://purl.org/linked-data/registry#statusStable> .