On Monday, November 26, 2012 04:46:32 PM Reto Bachmann-Gmür wrote: > On Sun, Nov 25, 2012 at 3:19 PM, Andy Seaborne <a...@apache.org> wrote: > > > Slight confusion between identity and equivalence. Two graph are > > equivalent by bNode-isomorphism; they are still different. > > > > Object.equals should implement an equivalence relation. As two graphs are > equivalent by rdf semantics iff they are isomorphic equals should return > true for isomorphic graphs.
.equals() is tossed around fairly casually in Java programs (perhaps that's just me); it's not clear to me that having a modelorgraph's .equals() being graph isomorphism -- potentially muchly expensive if bnodes are in play -- is the most effective choice. Chris ["equals should implement equivalence" doesn't entail "equals is isomorphism". Identity is an equivalence relation too.] -- "The wizard seemed quite willing when I talked to him." /Howl's Moving Castle/ Epimorphics Ltd, http://www.epimorphics.com Registered address: Court Lodge, 105 High Street, Portishead, Bristol BS20 6PT Epimorphics Ltd. is a limited company registered in England (number 7016688)
