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# Factorio Runtime Docs Version 2.0.77

# RecipeCategoryID - Runtime Docs

## RecipeCategoryID :: union

A recipe category may be specified in one of two ways.

#### Union members

LuaRecipeCategoryPrototype | By recipe category prototype.
string | By name of the recipe category prototype.

Concept used in

- LuaRecipe::has_category()
- LuaRecipePrototype::has_category()