A codex is a data type with its data stored as key/value pairs. Each key is a unique string and acts as a lookup for its corresponding value within the codex, similar to a dictionary. The key/value pairs are enclosed by square brackets after the “codex” keyword, with each key written as a string and a colon between a key and its corresponding value. Key/value pairs are separated by commas. If loading data from a JSON file and it contains an object with properties, the object will be stored as a codex (see Data Files).
codex["id": "ITEM_0001", "count": 5]
The codex variable above will contain a lookup with keys named “id” and “count”, with corresponding values of “ITEM_0001” (as a string value) and 5 (as a number value). You could create a JSON data file containing an array of these codices as an easy way to maintain a list of items to give to the player when the game starts.