money.json

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "description": "A money type for all financial-related fields, such as balance, payment due, and so on.",
    "title": "Money type",
    "properties": 
    {
        "currency_code": 
        {
            "$ref": "currency_code.json"
        },
        "value": 
        {
            "type": "string",
            "description": "The value, which can be anything from:<ul><li>An integer. For currencies that are not typically fractional, such as `JPY`.</li><li>A three-place decimal fraction. For currencies that are subdivided into thousandths, such as `TND`.</li><li> An eight-place decimal fraction. For currencies such as Bitcoin.</li></li>For the required number of decimal places for a currency code, see ISO 4217.",
            "maxLength": 32,
            "pattern": "^((-?[0-9]+)|(-?([0-9]+)?[.][0-9]+))$"
        }
    },
    "required": 
    [
        "currency_code",
        "value"
    ]
}