Last month Google Added the ability to add standalone Reminders into their Calendar app (see article), i have tried to get those events through the standard Calendar Content provider but without any success, those items are not returned by the CalendarContract.Instances.CONTENT_URI query and also are not listed as alerts in the CalendarContract.CalendarAlerts.CONTENT_URI.
Maybe this data is not exported at all.
P.S. I know how to query reminders associated to events, this is not what i am asking here
