{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/aviationweather/json-schema/aviationweather-airport-schema.json",
  "title": "AviationWeather Airport Info",
  "description": "Airport metadata as returned by GET /api/data/airport?format=json.",
  "type": "object",
  "required": ["icaoId"],
  "properties": {
    "id":      { "type": "string", "description": "Primary identifier (often same as ICAO)." },
    "icaoId":  { "type": "string", "description": "ICAO identifier." },
    "iataId":  { "type": ["string","null"], "description": "IATA identifier." },
    "name":    { "type": "string" },
    "state":   { "type": ["string","null"] },
    "country": { "type": "string" },
    "source":  { "type": ["string","null"], "description": "Data source (e.g. FAA, ICAO)." },
    "type":    { "type": ["string","null"], "description": "Airport type/size classification." },
    "lat":     { "type": "number" },
    "lon":     { "type": "number" },
    "elev":    { "type": "integer", "description": "Elevation (meters)." },
    "magdec":  { "type": ["string","null"], "description": "Magnetic declination (e.g. \"3E\")." },
    "owner":   { "type": ["string","null"], "description": "Ownership (PUBLIC, PRIVATE, MILITARY)." },
    "runways": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id":        { "type": "string", "description": "Runway identifier (e.g. 01L/19R)." },
          "dimension": { "type": "string", "description": "Length x width in feet." },
          "surface":   { "type": "string", "description": "Surface code (CON, ASP, GVL, TURF, WATER, ...)." }
        }
      }
    },
    "freqs":   { "type": ["string","null"], "description": "Tower/ground/ATIS frequencies as space-delimited string." }
  }
}