Combination of the date attribute to use and how many periods ago to calculate the PoP for.
| Name | Type | Description | Notes |
|---|---|---|---|
| attribute | AfmObjectIdentifierAttribute | ||
| periods_ago | int | Number of periods ago to calculate the previous period for. | |
| 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] |