What is the difference between .xcdatamodeld and BadgerNew.xcdatamodel

Question

I think xcode 3 uses the latter, and xcode 4 uses the first.

Are they interchangeable?

Answer 1

.xcdatamodeld is a container for .xcdatamodel files. It is used for version control and migration. When moving a model from v1 to v2, you add a new xcdatamodel to it, which has v2 along with the display model.