Sets or gets a Uniform Resource Name (URN) for a target document.
HRESULT value = object.put_urn( v);HRESULT value = object.get_urn(* p);
URNs are an adjunct to URLs. A URL, which is the address used on the World Wide Web, specifies a particular file on a particular machine. A URN specifies the identity of a resource instead of its location.