void:classes leaf node

@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix void: <http://rdfs.org/ns/void#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

void:classes a rdf:Property,
        owl:DatatypeProperty ;
    rdfs:label "classes" ;
    rdfs:comment "The total number of distinct classes in a void:Dataset. In other words, the number of distinct resources occuring as objects of rdf:type triples in the dataset." ;
    rdfs:domain void:Dataset ;
    rdfs:range xsd:integer .