allOf:
  - $ref: './ResourceObject.yml'
  - type: object
    properties:
      attributes:
        $ref: './AlbumAttributes.yml'
      relationships:
        type: object
        properties:
          artists:
            type: array
            items:
              $ref: './AlbumArtistRelationship.yml'
          tracks:
            type: array
            items:
              $ref: './AlbumTrackRelationship.yml'
        required:
          - artists
          - tracks