Proposed changes to Appointment : Update Scope and Usage : Appointment resources are used to provide information about a planned meeting that may be in the future or past. The resource only describes a single meeting, a series of repeating visits would require multiple appointment resources to be created for each instance. Examples include a scheduled surgery, a follow-up for a clinical visit, a scheduled conference call between clinicians to discuss a case (where the patient is a subject, but not a participant) , the reservation of a piece of diagnostic equipment for a particular use, etc. The visit scheduled by an appointment may be in person or remote (by phone, video conference, etc.) All that matters is that the time and usage of one or more individuals, locations and/or pieces of equipment is being fully or partially reserved for a designated period of time. This definition takes the concepts of appointments in a clinical setting and also extends them to be relevant in the community healthcare space, and to ease exposure to other appointment / calendar standards widely used outside of healthcare.   subject 0..1  Reference(Group | Patient) // new field participant 1..*   type   0..*  CodeableConcept   period 0..1  Period // moved from end of structure   actor 0..1  Reference(Patient | Group | Practitioner | PractitionerRole | RelatedPerson | Device | HealthcareService | Location)   required 0..1  Boolean // changed from code   status   1..1  code   Update Encounter : participant 1..*   type   0..*  CodeableConcept   period 0..1  Period   actor 0..1  Reference(Patient | Group | Practitioner | PractitionerRole | RelatedPerson | Device | HealthcareService) // now has additional resource types included (and renamed from individual)   Update AppointmentResponse : actor 0..1 Reference(Patient | Group | Practitioner | PractitionerRole | RelatedPerson | Device | HealthcareService | Location) // now has additional resource types included