{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://airportgap.com/schemas/distance.json",
  "title": "AirportDistance",
  "description": "Great-circle distance result between two airports as returned by POST /airports/distance.",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Identifier composed of the two IATA codes separated by a hyphen.",
      "examples": ["JFK-LAX"]
    },
    "type": {
      "type": "string",
      "const": "airport_distance"
    },
    "attributes": {
      "type": "object",
      "description": "Distance attributes.",
      "properties": {
        "from_airport": {
          "$ref": "airport.json",
          "description": "Departure airport."
        },
        "to_airport": {
          "$ref": "airport.json",
          "description": "Destination airport."
        },
        "miles": {
          "type": "number",
          "description": "Distance in miles.",
          "examples": [2475.6]
        },
        "kilometers": {
          "type": "number",
          "description": "Distance in kilometers.",
          "examples": [3984.2]
        },
        "nautical_miles": {
          "type": "number",
          "description": "Distance in nautical miles.",
          "examples": [2150.8]
        }
      },
      "required": ["from_airport", "to_airport", "miles", "kilometers", "nautical_miles"]
    }
  },
  "required": ["id", "type", "attributes"]
}