content: {
    "$defs": {
      "Code": {
        "description": "Code is used for short identifies like country or state codes.",
        "pattern": "^[A-Z0-9]+$",
        "title": "Code",
        "type": "string"
      }
    },
    "$id": "https://gobl.org/draft-0/l10n/code",
    "$ref": "#/$defs/Code",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }