Why is the key obtained from "&2" not "rating"

[ddy123]

The key obtained from "&1" is the "primary" and "quality" key

[gbouget]

Why is the key obtained from "&2" not "rating" #1258
Because the node is 3 levels above.

The key obtained from "&1" is the "primary" and "quality" key
Are you sure?

[
  {
    "operation": "shift",
    "spec": {
      "rating": { // &3, three levels above
        "*": { // primary or quality (&2, two levels above)
          "*": { // value (&1, one level above)
            "$": "&3" // &3 starts here and moves up the tree nodes by two levels
          }
        }
      }
    }
  }
]

[ddy123]

The key obtained from "&1" is the "primary" and "quality" key
Why are these two different

[ddy123]

Why is the key obtained from "&2" not "rating" #1258
Because the node is 3 levels above.

The key obtained from "&1" is the "primary" and "quality" key
Are you sure?

[
  {
    "operation": "shift",
    "spec": {
      "rating": { // &3, three levels above
        "*": { // primary or quality (&2, two levels above)
          "*": { // value (&1, one level above)
            "$": "&3" // &3 starts here and moves up the tree nodes by two levels
          }
        }
      }
    }
  }
]

Please look above

[gbouget]

[ddy123]

thanks,I got it.The JSON tree is constructed by the ”spec“,not the "input".

[ddy123]

I still got it wrong. It's based on the current layer and iterating upwards