Best practice to export core data entities

I need to export a few entities with its relationships in order to import it in other iOS device. For example:

A.relationship1 <------>> B.relationship1 (one to many)B.relationship2 <-------> C.relationship1 (one to one)

Is there a way to serialize/deserialize (or other methods) to export/import "easily" a fragment of the core data model (objects and its relationships fetched by a fetched results controller? By serializing all the data pack (NSData or something), deserializing and inserting it to the context (importing).

Please point me in the right direction.Thanks in advance.