I have found this video that explain how to save using core data, when you are using a NSTable.
https://www.youtube.com/watch?v=9Du_6By97sM&list=PLE83F832121568D36&index=31
But I'm trying to have just a collection of Form elements, like NSTextField that get saved to a document.
I figured they would use a single row within the Entity, but I can't figure if it is even possible.