Creating Core Data data at design time

So this seems like a really dumb questions, but I can't find the answer anywhere and I've never really used Core Data before. Is there any way to create Core Data data at design time or only programmatically? I don't know if it's possible to create/edit the proper persistent store file, but that seems unsafe. It's seems like there has to be a way to do this.

Anyone know the answer?

Thanks.

Update: Further searching looks like it needs to be done programmatically of some sort. Can anyone verify that or have suggestions.

 

Thanks, yeah that's what thought. I was sort of looking for an excuse to use CoreData. I'll continue using a plist.