description:The type of identification. See `Identifier types`_ for supported values and additional property descriptions.
description:The type of identification. See [Identifier types](/client-server-api/#identifier-types) for supported values and additional property descriptions.
Begins a SAS key verification process using the `m.sas.v1` method. Typically sent as a `to-device`_ event.
Begins a SAS key verification process using the `m.sas.v1` method. Typically sent as a [to-device](/client-server-api/#send-to-device-messaging) event.
description:Flag indicating if the room containing this event was created with the intention of being a direct chat. See `Direct Messaging`_.
description:Flag indicating if the room containing this event was created with the intention of being a direct chat. See [Direct Messaging](/client-server-api/#direct-messaging).
description: '**NB: Usage of this event is discouraged in favour of the** `receipts module`_. **Most clients will not recognise this event.** Feedback events are events sent to acknowledge a message in some way. There are two supported acknowledgements:`delivered` (sent when the event has been received) and `read` (sent when the event has been observed by the end-user). The `target_event_id` should reference the `m.room.message` event being acknowledged.'
description: '**NB: Usage of this event is discouraged in favour of the** [receipts module](/client-server-api/#receipts). **Most clients will not recognise this event.** Feedback events are events sent to acknowledge a message in some way. There are two supported acknowledgements:`delivered` (sent when the event has been received) and `read` (sent when the event has been observed by the end-user). The `target_event_id` should reference the `m.room.message` event being acknowledged.'