Mac OS X Essentials • 56:13
As your application evolves, typically so does your data model. In Leopard, Core Data provides support for creating versioned managed object models and for migrating data from one version to another. Learn how you can use these new features to make it easier for you and your users to transition to the latest version of your application.
Speakers: Miguel Sanchez, Ron Lue-Sang
Unlisted on Apple Developer site