As mentioned in this comment it is currently not possible to rename relations (at least for ROOT based IO). It would be necessary to have "dynamic" branches for these relations or to get the old branch / relation names from the old datamodel definitions and then reading back the ObjectID branches should in principle be straight forward.
As mentioned in this comment it is currently not possible to rename relations (at least for ROOT based IO). It would be necessary to have "dynamic" branches for these relations or to get the old branch / relation names from the old datamodel definitions and then reading back the
ObjectIDbranches should in principle be straight forward.