Core Data Recipes Question

This is just a quick question I hav开发者_JS百科e about Apple's core data "Recipes" project, so I don't need elaborate answers. When you edit a recipe you can also edit the type. When the type cell is pressed it presents the user with a table view populated by multiple types. How exactly were those types created? I can't seem to find an explanation in the project code or in the .xcdatamodel (I've checked everywhere, and searched it) Also, why does "RecipeType" have to be it's own entity? Why can't it just be part of the "Recipe" entity? Does that have anything do with it?

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In this case RecipeType doesn't necessarily have to be its own type, but it is common practice. Using an association like this has many benefits. Say if you wanted to add more metadata per type, you could add it to the RecipeType instead of duplicating a bunch of data throughout your recipes.

It appears that these recipe types are already inserted into the SQLite database Recipes.sqlite. It doesn't appear that they used any of the code in the project to populate this database. It was most likely done using Terminal or some other GUI SQLite editor.