NameFlagsCard.TypeDescription & Constraintsdoco
.. Slot DomainResourceA slot of time on a schedule that may be available for booking appointments
... identifier Σ0..*IdentifierExternal Ids for this item
... type 0..1CodeableConceptThe type of appointments that can be booked into this slot (ideally this would be an identifiable service - which is at a location, rather than the location itself). If provided then this overrides the value provided on the availability resource
Practice Setting Code Value Set (Preferred)
... schedule Σ1..1Reference(Schedule)The schedule resource that this slot defines an interval of status information
... freeBusyType Σ1..1codebusy | free | busy-unavailable | busy-tentative
SlotStatus (Required)
... start Σ1..1instantDate/Time that the slot is to begin
... end Σ1..1instantDate/Time that the slot is to conclude
... overbooked 0..1booleanThis slot has already been overbooked, appointments are unlikely to be accepted for this time
... comment 0..1stringComments on the slot to describe any extended information. Such as custom constraints on the slot

doco Documentation for this format