On The Meaning of Fragment Identifiers, Norm Walsh. He explains what he meant by I think the assertion that a URI with a fragment identifier points to a dream or a car is absolutely unassailable. From a specification legalese point of view, that's rock solid. since the RDF Concepts and Abstract Syntax working draft defines fragment identifiers in RDF and allows them to point to an abstract idea, like Graham Klyne's car or a mythical Unicorn. (ibid)