Some of slides posted on Twitter from Microsoft’s Confidential documentation, reveal more about how the developers and users can handle notifications in Action Center on Windows Phone 8.1.
Devs can remove, tag, group notifications or replace with a new one. Thet can also set when the notification expires. They can also enable Ghoast toast notifications, which will appear only in notification center
There is a limit of 20 notifications per app and notification for last 7 days or less will be shown. Users will be able to tap on, remove one, a group of or all the notifications.
You can read the most comprehensive Windows Phone 8.1 changelog by going to our Windows Phone 8.1 page.
Thanks WPFan for the tip.