content: {
    "$defs": {
      "ExchangeRate": {
        "description": "ExchangeRate contains data on the rate to be used when converting amounts from the document's base currency to whatever is defined.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "How much is 1.00 of this currency worth in the documents currency.",
            "title": "Amount"
          },
          "currency": {
            "$ref": "https://gobl.org/draft-0/currency/code",
            "description": "ISO currency code this rate represents.",
            "title": "Currency"
          }
        },
        "required": [
          "currency",
          "amount"
        ],
        "type": "object"
      }
    },
    "$id": "https://gobl.org/draft-0/currency/exchange-rate",
    "$ref": "#/$defs/ExchangeRate",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }