I would like to be able to validate the documents so that no extra fields, beyond the ones already declared. For example if i have a schema like this :

    "group1.a": {
      "$type": "int"
    },
    "group1.b": {
      "$type": "int"
    }

I would like the following document to fail:

    {
       "group1": {
          "a": 1,
          "b": 2,
          "c": 3
       }
    }