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<section>
<h4>RDFS</h4>
-RDFS is the schema language for RDF; it describes constructs for types of objects (Classes), relating types to one another (subClasses), properties that describe objects (Properties), and relationships between them (subProperty).
+RDFS is the schema language for RDF; it describes constructs for types of objects (Classes), relating types to one another (subClasses), properties that describe objects (Properties), and relationships between them (subProperty). <a href="http://www.w3.org/TR/rdf-schema/"> RDF Schema W3C Recommendation</a>
</section>
<section>