{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "MusicRecording",
  "type": "object",
  "properties": {
    "byArtist": {
      "oneOf": [
        { "$ref": "#/definitions/MusicGroup" },
        { "$ref": "#/definitions/Person" }
      ],
      "description": "The artist that performed this album or recording."
    },
    "duration": {
      "type": "string",
      "description": "The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format."
    },
    "inAlbum": {
      "$ref": "#/definitions/MusicAlbum",
      "description": "The album to which this recording belongs."
    },
    "inPlaylist": {
      "$ref": "#/definitions/MusicPlaylist",
      "description": "The playlist to which this recording belongs."
    },
    "isrcCode": {
      "type": "string",
      "description": "The International Standard Recording Code for the recording."
    },
    "recordingOf": {
      "$ref": "#/definitions/MusicComposition",
      "description": "The composition this track is a recording of."
    }
  },
  "definitions": {
    "MusicGroup": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "genre": { "type": "string" },
        "members": {
          "type": "array",
          "items": { "$ref": "#/definitions/Person" }
        }
      }
    },
    "Person": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "birthDate": { "type": "string", "format": "date" },
        "nationality": { "type": "string" }
      }
    },
    "MusicAlbum": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "releaseDate": { "type": "string", "format": "date" },
        "byArtist": { "$ref": "#/definitions/MusicGroup" }
      }
    },
    "MusicPlaylist": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "numberOfTracks": { "type": "integer" },
        "tracks": {
          "type": "array",
          "items": { "$ref": "#/definitions/MusicRecording" }
        }
      }
    },
    "MusicComposition": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "composer": { "$ref": "#/definitions/Person" },
        "dateComposed": { "type": "string", "format": "date" }
      }
    }
  }
}