A slot of time on a schedule that may be available for booking appointments. A slot of time on a schedule that may be available for booking appointments. If the element is present, it must have either a @value, an @id, or extensions External Ids for this item. A broad categorization of the service that is to be performed during this appointment. The 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 Schedule resource. The specialty of a practitioner that would be required to perform the service requested in this appointment. The style of appointment or patient that may be booked in the slot (not service type). The schedule resource that this slot defines an interval of status information. busy | free | busy-unavailable | busy-tentative | entered-in-error. Date/Time that the slot is to begin. Date/Time that the slot is to conclude. This slot has already been overbooked, appointments are unlikely to be accepted for this time. Comments on the slot to describe any extended information. Such as custom constraints on the slot. Busy Free Busy (Unavailable) Busy (Tentative) Entered in error If the element is present, it must have either a @value, an @id, or extensions