These are the equivalent of Hash Maps or Python Dictionaries for Nix. Writing Methods = for children x = { one = "hello"; two = "world"; three = 9; } . for children x.one = "hello"; x.two = "world"; x.three = 9; = to a set x = {one = "hello"}; x = {two = "world"}; x = {three = 9}; Reading Children x.one // > "hello"