{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/united-airlines/main/json-schema/united-airlines-booking-schema.json",
  "title": "United Airlines Booking",
  "description": "Schema representing a United Airlines flight booking (PNR) with passenger, itinerary, and pricing information.",
  "type": "object",
  "properties": {
    "bookingId": {
      "type": "string",
      "description": "Unique booking identifier"
    },
    "recordLocator": {
      "type": "string",
      "description": "PNR record locator (6-character alphanumeric code)",
      "pattern": "^[A-Z0-9]{6}$",
      "examples": ["ABCDEF"]
    },
    "status": {
      "type": "string",
      "enum": ["confirmed", "held", "cancelled"],
      "description": "Current booking status"
    },
    "passengers": {
      "type": "array",
      "description": "List of passengers on the booking",
      "items": {
        "$ref": "#/$defs/Passenger"
      },
      "minItems": 1
    },
    "itineraries": {
      "type": "array",
      "description": "Outbound and/or return journey itineraries",
      "items": {
        "$ref": "#/$defs/Itinerary"
      }
    },
    "price": {
      "$ref": "#/$defs/Price"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Booking creation timestamp"
    },
    "expiresAt": {
      "type": "string",
      "format": "date-time",
      "description": "Expiry timestamp for held bookings"
    }
  },
  "required": ["bookingId", "recordLocator", "status", "passengers", "itineraries", "price"],
  "$defs": {
    "Passenger": {
      "type": "object",
      "title": "Passenger",
      "description": "A passenger on the booking",
      "properties": {
        "firstName": { "type": "string" },
        "lastName": { "type": "string" },
        "type": {
          "type": "string",
          "enum": ["ADT", "CHD", "INF"],
          "description": "Passenger type: Adult, Child, Infant"
        },
        "dateOfBirth": {
          "type": "string",
          "format": "date"
        },
        "mileagePlusNumber": {
          "type": "string",
          "description": "United MileagePlus loyalty number"
        },
        "knownTravelerNumber": {
          "type": "string",
          "description": "TSA PreCheck Known Traveler Number"
        }
      },
      "required": ["firstName", "lastName", "type"]
    },
    "Itinerary": {
      "type": "object",
      "title": "Itinerary",
      "description": "A travel itinerary consisting of one or more flight segments",
      "properties": {
        "duration": {
          "type": "string",
          "description": "Total journey duration in ISO 8601 duration format",
          "examples": ["PT4H30M"]
        },
        "segments": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/FlightSegment"
          }
        }
      },
      "required": ["segments"]
    },
    "FlightSegment": {
      "type": "object",
      "title": "Flight Segment",
      "description": "An individual flight leg within an itinerary",
      "properties": {
        "flightNumber": {
          "type": "string",
          "description": "United Airlines flight number",
          "examples": ["UA523"]
        },
        "origin": {
          "type": "string",
          "description": "IATA origin airport code",
          "pattern": "^[A-Z]{3}$"
        },
        "destination": {
          "type": "string",
          "description": "IATA destination airport code",
          "pattern": "^[A-Z]{3}$"
        },
        "departureTime": {
          "type": "string",
          "format": "date-time"
        },
        "arrivalTime": {
          "type": "string",
          "format": "date-time"
        },
        "aircraft": {
          "type": "string",
          "description": "Aircraft type",
          "examples": ["Boeing 737 MAX 9"]
        },
        "operatingCarrier": {
          "type": "string",
          "description": "IATA carrier code",
          "examples": ["UA"]
        }
      },
      "required": ["flightNumber", "origin", "destination", "departureTime", "arrivalTime"]
    },
    "Price": {
      "type": "object",
      "title": "Price",
      "description": "Monetary price breakdown",
      "properties": {
        "total": {
          "type": "number",
          "format": "double",
          "description": "Total amount including taxes"
        },
        "base": {
          "type": "number",
          "format": "double",
          "description": "Base fare amount"
        },
        "taxes": {
          "type": "number",
          "format": "double",
          "description": "Total tax amount"
        },
        "currency": {
          "type": "string",
          "description": "ISO 4217 currency code",
          "examples": ["USD"]
        }
      },
      "required": ["total", "currency"]
    }
  }
}