| Question asked
|
ONE: The given example is a very tiny one … ONE: The given example is a very tiny one w.r.t original query and set of policies defined. Is there any estimate available about what is the number of typical policies on a decent size RDF triple store. TWO: How big a transformed query turns after applying all the policies (THREE:) and especially if multiple policies defined by multiple people get applied? The paper says that if deny policy is applicable then access triple is denied, but then this generic approach doesn't seem to embrace some user's preference to allow access to some information, unless a within policies is provided. E.g. Alice says allow access to (l3s:alice, foaf:phone, Z) and Harry says deny access to (X, foaf:phone, Z)? ry says deny access to (X, foaf:phone, Z)?
|
