The managed object model of the document.
- macOS 10.4+
By default the Core Data framework creates a merged model from all models in the application bundle (
[NSBundle main). You can reimplement this property and return a specific model to use to create persistent stores. A typical implementation might include code similar to the following fragment:
In applications built in OS X v10.4, by default the Core Data framework creates a merged model from all the models found in the application bundle and the frameworks against which the application is linked.