{ "name": "upper", "type": "function", "groups": ["String"], "description": "Converts a string to upper case letters.", "arguments": [{ "arg": "string", "description": "the string to convert to upper case" }], "examples": [{ "expression": "upper('hello WOrld')", "returns": "'HELLO WORLD'" }], "tags": ["converts", "upper", "letters", "case"] }