The RDF Vocabulary (RDF) This is the RDF Schema for the RDF vocabulary defined in the RDF namespace. type The subject is an instance of a class. Property The class of RDF properties. Statement The class of RDF statements. subject The subject of the subject RDF statement. predicate The predicate of the subject RDF statement. object The object of the subject RDF statement. Bag The class of unordered containers. Seq The class of ordered containers. Alt The class of containers of alternatives. value Idiomatic property used for structured values. List The class of RDF Lists. nil The empty list, with no items in it. If the rest of a list is nil then the list has no more items in it. first The first item in the subject RDF list. rest The rest of the subject RDF list after the first item. XMLLiteral The class of XML literal values.