This specification reuses much of the same terminology as iCalendar [RFC5545], iTIP [RFC5546], WebDAV [RFC4918], and CalDAV [RFC4791]. Additional terms used by this specification are as follows:
Scheduling object resource: A calendar object resource contained in a calendar collection for which the server will take care of sending scheduling messages on behalf of the owner of the calendar collection.
Organizer scheduling object resource: A scheduling object resource owned by the "Organizer".
Attendee scheduling object resource: A scheduling object resource owned by an "Attendee".
Scheduling operation: Add, change, or remove operations on a scheduling object resource for which the server will deliver scheduling messages to other calendar users.
Scheduling message: A calendar object that describes a scheduling operation such as schedule, reschedule, reply, or cancel.
Scheduling Outbox collection: A resource at which busy time information requests are targeted.
Scheduling Inbox collection: A collection in which incoming scheduling messages are delivered.