Social Meaning of RDF
http://www.xml.com/pub/a/2003/03/05/social.html
he RDF Concepts and Abstract Syntax specification (hereafter, "Concepts") says that an RDF graph ("a set of triples", according to Concepts 3.1) has two kinds of meaning: a formal and a social meaning. The formal meaning of an RDF graph results from applying the RDF semantics , based on model-theoretic semantics, to the graph. But, as both Concepts and the RDF semantics documents suggest, there is another aspect to the meaning of an RDF graph, the social meaning.