HL7 Version 3 Standard: Scheduling, Release 2 Reaffirmed

HL7 Version 3 Standard: Scheduling, Release 2 was reaffirmed by ANSI on 2019-06-07.
The HL7 Version 3 Normative Edition’s Scheduling document describes a messaging architecture for the notification of scheduling information from a scheduling system to auxiliary systems. This includes notifications of new, revised, cancelled, and rescheduled appointments. The messages in this document can be utilized “as is” for generic appointments where minimal detail is required. This section can also be used as a pattern for scheduling specialized activities.
See more at https://www.hl7.org/implement/standards/product_brief.cfm?product_id=60.