]> Qualifiers ontology v. 1.0 1.0 en Qualifiers ontology Paolo Ciccarese January 28, 2009 rdf/xml Qualifiers are annotation performed through the usage of a controlled vocabulary. Terms belonging to vocabularies expressed with skos are only one example of qualifiers. Qualifiers are annotation performed through the usage of a controlled vocabulary. Terms belonging to vocabularies expressed with skos are only one example of qualifiers. Qualifiers concepts are defined through skos:Concepts. Reified version of property qualifiedBy.