Alexa.Presentation (v1.0)
The Alexa.Presentation namespace extends the Alexa Voice Service (AVS) to include rendering multi-modal experiences on a device with a display. This namespace defines common presentation behaviors, including the events that devices use to report presentation lifecycle updates to AVS.
Each Presentation instance contains a single APL document, which corresponds to a presenationToken that identifies document.
To learn more about APL, its interfaces, and how to use those interfaces together, see Alexa Presentation Language (APL) Overview.
Capability Assertion
Alexa.Presentation 1.0 may be implemented by the device on its own behalf, but not on behalf of any connected endpoints.
New AVS integrations must assert support through Alexa.Discovery, but Alexa will continue to support existing integrations using the Capabilities API.
Sample Declaration
{
"type": "AlexaInterface",
"interface": "Alexa.Presentation",
"version": "1.0"
}
Dismissed Event
Devices send a Dismissed event to Alexa to report that a Presentation has been dismissed. Always send the Dismissed event along with a complete Context object. See Context for more details.
The active Skill receives a SessionEnded request when the device sends the Dismissed event. Send a Dismissed event for the following conditions:
- The active view timed out and the device now displays the home screen. See SessionEndedRequest, reason: EXCEEDED_MAX_REPROMPTS.
- The end user pressed a
GO_BACKbutton that triggered a previous screen to be shown again, dismissing the current view. See SessionEndedRequest, reason: USER_INITIATED. - An error occurred that ended the session. See SessionEndedRequest, reason: ERROR.
Sample Dismissed Event message
The following sample code shows the structure for a Dismissed event message:
{
"header": {
"namespace": "Alexa.Presentation",
"name": "Dismissed",
"messageId": STRING
},
"payload": {
"presentationToken": STRING
}
}
Dismissed Event Payload parameters
The following table lists the payload parameters for the Dismissed event:
| Field | Type | Description |
|---|---|---|
| presentationToken | STRING | Opaque token for the active presentation. |
