I have come to a roadblock in my current project. I basically have an app that is much like the Core Data Recipe app... Here is the basic structure I have in my .xcdatamodel
How do I go about setting my Restaurants Catagory with the different values? and then how do I fetch them back?
The best thing to do is go through the Core Data Tutorial for iPhone, which goes through how to add new managed object instances of an Entity type (in your case, "Restaurant"), set that instance's attributes (e.g., "Restaurant.category") and fetch results.
The tutorial uses an Entity type called "Event" which has date and location attributes, but the ideas are all the same.