is specialization of leaf node

@prefix dct: <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 sio: <http://semanticscience.org/resource/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

sio:isSpecializationOf a owl:ObjectProperty ;
    rdfs:label "is specialization of"@en ;
    dct:description "is specialization of is a relation between a more specific instance (in terms of spatial/temporal localization & other attributres) than the other."@en ;
    sio:equivalentTo "http://www.w3.org/ns/prov#specializationOf"^^xsd:anyURI ;
    rdfs:isDefinedBy <http://semanticscience.org/ontology/sio/v1.53/sio-subset-labels.owl> ;
    rdfs:subPropertyOf sio:isVariantOf ;
    owl:inverseOf sio:isGeneralizationOf ;
    skos:example "a weather forecast for the city of London produced at a specific time is a specialization of a weather forecast for the city of London."@en .