Optional
agent_For messages that are sent between the user and a human agent, we assign an agent type to the message to distinguish what type it is.
Optional
descriptionThe description of the source URL. This property is unfurled from the source URL at runtime. It is used when IFrameItemDisplayOption is set to 'panel' for the preview card to open the panel.
Optional
displayHow the iframe should be displayed.
Optional
image_The preview image of the source URL. This property is unfurled from the source URL at runtime. It is used when IFrameItemDisplayOption is set to 'panel' for the preview card to open the panel.
Optional
message_Options that control additional features available for a message item.
The response type of this message item.
The source URL to an embeddable page
Optional
streaming_Metadata used identify a generic item within the context of a stream in order to correlate any updates meant for a specific item.
Optional
titleThe title of the source URL. This property is unfurled from the source URL at runtime. It is used when IFrameItemDisplayOption is set to 'panel' for the preview card to open the panel.
Optional
user_An optional buckets of additional user defined properties for this item.
The basic class for items returned from a back-end as part of a message response. These are the items contained in the MessageOutput.generic array.