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.

Existing Categories

Link to existing-categories

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