The only source of knowledge is experience.
In Chapter 1, the fundamental Core Data building blocks were added to the Grocery Dude sample application. You configured a persistent store, coordinator, model and context however the object graph remained empty. This means that although all the ingredients are ready to make cookies, you’re missing the cookie cutters! This chapter explains managed object model basics and takes you through the process of configuring an object graph for the sample application.
A managed object model represents a data structure. The terms data structure, schema, object graph, data model, and managed object model may all be used interchangeably, ...