Core Data can be intimidating at first. With a proper introduction, the transition into using Core Data can be much smoother. This presentation gives an overview of the core and advanced parts of Core Data.
If you change your model you must migrate the data to match the new data model Use a custom mapping model for changes Lightweight migration automatically makes minor changes (Snow Leopard/iOS 3.0+) Jedi Level
One MOM may have many configurations A configuration is a subset of entities Typically used to store different entities in different stores using one store coordinator Jedi Level