is directly after 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/> .

sio:isDirectlyAfter a owl:FunctionalProperty,
        owl:ObjectProperty ;
    rdfs:label "is directly after"@en ;
    dct:description "is directly after is a relation between entities placed on a dimensional axis in which the projection of the position of the first entity is numerically greater than the projection of the position of the second entity, and the entities are adjacent to one another."@en ;
    rdfs:isDefinedBy <http://semanticscience.org/ontology/sio/v1.53/sio-subset-labels.owl> ;
    rdfs:subPropertyOf sio:isDirectlyConnectedTo,
        sio:isPositionallyAfter ;
    owl:inverseOf sio:isDirectlyBefore .