> [!WARNING] > **Developer Preview:** Available as part of the [Google Workspace Developer Preview Program](https://developers.google.com/workspace/preview), which grants early access to certain features. This feature is available in `https://developers.google.com/workspace/classroom/reference/rest/v1/PreviewVersion` and later. See [Access Preview APIs](https://developers.google.com/workspace/classroom/reference/preview) to learn more. The availability status of a learning standard document or item.
| Enums || |---|---| | `LEARNING_STANDARD_AVAILABILITY_STATE_UNSPECIFIED` | No availability state. This value is never returned. | | `LEARNING_STANDARD_AVAILABLE` | Available state, meaning the document or item still exists in the data source. This is the default state. | | `LEARNING_STANDARD_ITEM_DELETED` | Deleted state. Indicates that the item has been deleted from the data source. Some data fields in this item might be unpopulated. | | `LEARNING_STANDARD_DOCUMENT_DELETED` | This item's parent document has been deleted from the data source. Some data fields in this item might be unpopulated. |