{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "VariableWithHash",
  "allOf": [
    {
      "$ref": "#/components/schemas/Variable"
    },
    {
      "type": "object",
      "properties": {
        "hash": {
          "type": "string",
          "description": "SHA-256 hash of the variable key + attributes"
        }
      }
    }
  ]
}