I'm used to using Hibernate in Java applications, and Many-To-One relationships are common there when for creating a link from ObjectA to a ReferenceObjectB. ReferenceObjectB may be an atomic class, that doesn't have any relationships to any other objects. ReferenceObjectB may be used in multiple other objects.
In my iOS app, I am using Core Data for the data model. I have created an ObjectA that has a one-to-many relationship to ReferenceObjectB, and created without an Inverse Relationship, as I want the relationship to act like the Many-To-One from Hibernate.
Seems to work. However, Xcode produces a warning: "Misconfigured Property: TimeItem.extraData should have an inverse" Is this a warning that should be heeded with Core Data, or is it just noise in this situation?