# IndexOperationMetadata

- [JSON representation](https://docs.cloud.google.com/datastore/docs/reference/admin/rest/Shared.Types/IndexOperationMetadata#SCHEMA_REPRESENTATION)

Metadata for Index operations.

| JSON representation |
|---|
| ``` { "common": { object (`https://docs.cloud.google.com/datastore/docs/reference/admin/rest/Shared.Types/CommonMetadata`) }, "progressEntities": { object (`https://docs.cloud.google.com/datastore/docs/reference/admin/rest/Shared.Types/Progress`) }, "indexId": string } ``` |

| Fields ||
|---|---|
| `common` | ``object (`https://docs.cloud.google.com/datastore/docs/reference/admin/rest/Shared.Types/CommonMetadata`)`` Metadata common to all Datastore Admin operations. |
| `progressEntities` | ``object (`https://docs.cloud.google.com/datastore/docs/reference/admin/rest/Shared.Types/Progress`)`` An estimate of the number of entities processed. |
| `indexId` | `string` The index resource ID that this operation is acting on. |