<rdf:RDF
	xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
	xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
	xmlns:ex="http://www.example.org/reasoners/"
	xmlns="http://www.example.org/reasoners/subclass/">

	<rdf:Description rdf:about="">
		<rdfs:comment>To show the semantic of the rdfs:subClassOf relation</rdfs:comment>
		<rdfs:comment>
		Works with:
		* /owl
		* /rdfs
		* /owlmini
		* /owl2
		</rdfs:comment>
	</rdf:Description>
	
	<!-- item_1 is an Article -->
	<ex:Article rdf:about="http://www.example.org/reasoners/item_1"/>
	
	<!-- An article is a kind of Document -->
	<rdf:Description rdf:about="http://www.example.org/reasoners/Article">
		<rdfs:subClassOf rdf:resource="http://www.example.org/reasoners/Document"/>
	</rdf:Description>
	
	<!-- An document is a kind of content item -->
	<rdf:Description rdf:about="http://www.example.org/reasoners/Document">
		<rdfs:subClassOf rdf:resource="http://www.example.org/reasoners/ContentItem"/>
	</rdf:Description>
	
</rdf:RDF>