Best Persistence model for iPhone development

I'm finishing my second book on iPhone development (Beginning Iphone 3 Development - Mark/LaMarche) and, while this book covers the 4 main persistence mechanisms, I'm still not sure which one to use for my application. My data model is not very intricate, but I do need some relationship definition and functionality.

So what are the seasoned developers using out there and could you please point me to some sample 开发者_开发问答code that involves more than one entity with some basic relationships?

I would really appreciate any input.

Rod

Always use SQLite for production with very few exceptions. If you are one of this exceptions you will know it :)

SQLite has too many advantages to choose any other for production.