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To help Core Data perform the migration, though, you may have to provide information about how to map from one version of the model to another.This information may be in the form of hints within the versioned model itself, or in a separate mapping model file that you create.Typically, as it evolves from one version to another, numerous aspects of your application change: the classes you implement, the user interface, the file format, and so on.

You can only open a Core Data store using the managed object model used to create it.This document assumes that you are familiar with the Core Data architecture and the fundamentals of using Core Data.


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