{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/nasa/blob/main/json-schema/rover-photo.json",
  "title": "Mars Rover Photo",
  "description": "A photo taken by a NASA Mars rover.",
  "type": "object",
  "properties": {
    "id": {
      "type": "integer",
      "description": "Unique identifier for the photo."
    },
    "sol": {
      "type": "integer",
      "description": "Martian sol (day) on which the photo was taken."
    },
    "camera": {
      "$ref": "camera.json"
    },
    "img_src": {
      "type": "string",
      "format": "uri",
      "description": "URL of the image."
    },
    "earth_date": {
      "type": "string",
      "format": "date",
      "description": "Earth date when the photo was taken."
    },
    "rover": {
      "$ref": "rover.json"
    }
  },
  "required": ["id", "sol", "img_src", "earth_date"]
}