, j6 S/ C+ N h5 C $ t: D" u s2 ?2 W+ k0 ~open references - references which cannot be resolved because their target object is currently not available 5 y9 ~5 T- b* |( T ( p, X, E8 i$ O # Z+ w2 p; \* V: z6 @modified - object to right has been modified since last save to database