I\'ve built a static library that makes heavy use of the Core Data framework. I can successfully use the library in my external project, but ONLY if I include the .xcdatamod
Prairiedogg's answer is a little outdated, here's a tutorial on doing this in Xcode 5: http://bharathnagarajrao.wordpress.com/2014/02/14/working-with-core-data-in-a-static-library/