itemReference
A unique reference for the reservation.
Declaration
@NSCopying var itemReference: INSpeakableString { get }Discussion
Provide information that identifies this specific reservation. The vocabularyIdentifier should be specific enough that your app can use it to retrieve and display this reservation’s info later. The spokenPhrase should describe the event to the user. For example, a restaurant reservation might use a phrase like “Table for 2 at McNeil’s on February 11” or “7pm at McNeil’s”. For a multi-part reservation, such as a round-trip ticket, provide an itemReference that is specific to this portion of the overall reservation.