{

  "dim": null, // Our size.

  "src": {
    "id" : id, // What we consider to be our main source
    "dim": null, // Our main source's size.
    "sub": null, // What we take from our main source.
  },

  "parents": {
    id: {

      "dim": null, // Parent's size.
      "sub": null, // What we take from parent relative to parent.

      // This parent's main source.
      "src": {
    "id" : id,
    "dim": null,
    "sub": null,
      }

    },
    ...
  }

}