# DialogSpec

- [JSON representation](https://developers.google.com/assistant/df-asdk/reference/webhook/rest/Shared.Types/DialogSpec#SCHEMA_REPRESENTATION)

Prompts related metadata for helper sub-dialogs.

| JSON representation ||
|---|---|
| ``` { "extension": { "@type": string, field1: ..., ... } } ``` |

| Fields ||
|---|---|
| `extension` | `object` Holds helper specific dialog specs if any. For example: ConfirmationDialogSpec for confirmation helper. An object containing fields of an arbitrary type. An additional field `"@type"` contains a URI identifying the type. Example: `{ "id": 1234, "@type": "types.example.com/standard/id" }`. |