Source object reference (attribute or fact) including aggregation operation.
| Name | Type | Description | Notes |
|---|---|---|---|
| operation | str | Aggregation operation. | |
| reference | SourceReferenceIdentifier | ||
| any string name | bool, date, datetime, dict, float, int, list, str, none_type | any string name can be used but the value must be the correct type | [optional] |