Extract Keys

The Extract Keys command (Command Type: 1011) extracts the keys of objects from an array of child objects and returns them in a simplified format.

Overview

The Extract Keys command provides functionality for:

Command Type ID: 1011

Parameter	Type	Description	Required
childKey	string	The property name to use as a wrapper for the extracted keys in the output	Yes

{
  "command": "extract-keys",
  "params": {
    "childKey": "markets"
  }
}

{
  "command": "extract-keys",
  "params": {
    "childKey": "attributes"
  }
}

Structure Simplification: Flatten nested object key arrays into a simpler format
Key Discovery: Extract what keys are present in dynamic or schema-less child objects
Pipeline Preparation: Prepare key lists for downstream mapping or filtering