A schedule-calendar is a calendar collection which a client can poll to receive scheduling notifications server when changes are made to a schedule-calendar which affect this principal. Defined in CalDAV Scheduling Extensions to WebDAV (RFC6638).
- Each principal should only have one schedule-inbox collection.
- A schedule-inbox collection is not a calendar collection. It contains scheduling messages, which are not events, per se, although they resemble them.
- Must not be a child of a calendar.
- Can't depend on UID of scheduling messages for uniqueness.