How to cause iOS 9 to automatically create a calendar event from a reservation email?

The WWDC keynote and iOS 9 preview page https://www.apple.com/ios/ios9-preview/ mention "If you get an email with a flight reservation or restaurant confirmation, iOS 9 can create a suggested event in Calendar for you."


Haven't found any documentation on whether developers are required to do anything special to their emails, along the lines of how Google requires the schema.org tags https://developers.google.com/gmail/markup/reference/event-reservation , perhaps.


I've got several emails in my Inbox in the Mail app that refer to restaurant and flight reservations but I'm not seeing any suggested events in Calendar, even though I've enabled the "Events Found in Mail" preference at the bottom of Settings->Mail, Contacts, Calendars.


Anyone know any more about how this is supposed to work?

An update here. I'm running iOS 9 Public Beta 2 (since 25 July) and now I'm seeing some suggested events appearing in Calendar. But the three emails (so far) that have caused suggested events have seemingly little in common. One has schema.org tags embedded in it but the others don't. I also have several emails in my Mail app that are referring to events that are not causing suggested events.


Any documentation that people are aware of?

Apple have no history of publishing documentation for OS features like this.


It's expected to "just work" and, if it doesn't, Public Beta testers are asked to give feedback through the built-in Feedback Assistant app, which can be opened from the second page of the Home screen on your iOS device.


Alternatively, you can send feedback directly to Apple with https://bugreport.apple.com/

How to cause iOS 9 to automatically create a calendar event from a reservation email?
 
 
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