Core Data describes entities with a Managed Object Model

Entities controlled by Core Data are called Managed Objects. The way you deal with your entity descriptions (properties, relationships, type information, etc.) for Core Data is through a Managed Object Model. Core Data looks at that Managed Object Model at runtime to figure out how to load and save data from its persistent store (e.g., a database). The Xcode template we used comes with an empty Managed Object Model to get us started. Let’s take a closer look.