The Blueprint has a Required String parameter called "Category". This String allows you to "Categorise" your recipes to a specific Blueprint Category.

If this string returns a Category not already existing it'll create that Category and an appropriate Blueprint. If it finds an existing Category it'll add the recipe to said Category.

Category:	Name:	Localized Name:
Category: Category	Name: components	Localized Name: Crafting Components
Category: Category	Name: molds	Localized Name: Metal Press Molds
Category: Category	Name: bullet	Localized Name: Common Projectiles
Category: Category	Name: specialBullet	Localized Name: Specialized Projectiles
Category: Category	Name: electrode	Localized Name: Arc Furnace Electrodes