{
  "type": "tradle.Model",
  "id": "my.custom.AddressForm",
  "title": "Your Address",
  "subClassOf": "tradle.Form",
  "properties": {
    "what3words": {
      "type": "string",
      "description": "Your three-word address on https://map.what3words.com"
    }
  }
}