SELECT ?title WHERE { ?? (rdfs:label|skos:prefLabel|schema:name) ?title . } Hierarchy

SELECT ?class WHERE { ?? (rdf:type|owl:type) ?class . } Class

SELECT ?description WHERE { ?? (rdfs:comment|schema:description) ?description . } A hierarchy is defined and can be named schema:name. This can help user interfaces to allow a selection in case of multiple hierarchies.