 <p>You can ask your <code>NSManagedObjectModel</code> by sending <code>versionIdentifiers</code> to the receiver.</p> <pre><code>- (NSSet *)versionIdentifiers </code></pre> <p>The docu is <a href="https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/CoreDataFramework/Classes/NSManagedObjectModel_Class/Reference/Reference.html#//apple_ref/doc/uid/TP40003610" rel="nofollow">here</a></p>