title: Create separate xcdatamodel file for Core Data and merge them on runtime
body: <p>I have a project separated in one main-project and sub-projects.</p>
  
  <p>I have some abstract entities in the Core Data Model file in the main-project and I would create entities which inherit of the abstract entities into each sub-projects in other Core Data Model file.</p>
  
  <p>Then, when I run the app, I would merge all the Core Data Model files in one.</p>
  
  <p>Do you know if it's possible?</p>
  
  <p>Thanks a lot!</p>