Changes

The term persistent object store refers to the underlying storage environment in which data are stored when using Core Data. Core Data supports three disk-based and one memory-based persistent store. Disk based options consist of SQLite, XML and binary. By default, the iOS SDK will use SQLite as the persistent store. In practice, the type of store being used is transparent to you as the developer. Regardless of your choice of persistent store, your code will make the same calls to the same Core Data APIs to manage the data objects required by your application.

== Defining an Entity Description ==