@startuml
hide circle
hide empty members
skinparam linetype ortho

class "Slot" as Sl #SkyBlue {
  - start
  - end
  - serviceType
  - appointmentType
  ...
  + reference(Schedule)
  + reference(HealthcareService)
}

class "Schedule" as Sc #SkyBlue {
   + actor.reference(Practitioner)
   + actor.reference(PractitionerRole)
}

class "Practitioner" as PS #LimeGreen {
   - identifier : <b>IDNPS</b>
   - specialty
   ...
}

class "PractitionerRole" as PR #LimeGreen {
    - location (contained)
   + reference(Practitioner)
   + reference(Organization)
}

class "HealthcareService" as HS #LimeGreen {
    + providedBy.reference(Organization)
}

class "Organization" as Orga #LimeGreen {
    - identifier : <b>IDNST</b>
    - name
    - telecom
}

class "Appointment" as Ap #SkyBlue {
   - status
   - start
   - end
   - created
   ...
   + participant.actor.reference(Practitioner)
   + participant.actor.reference(HealthcareService)

}

PR "0..*"-->"1" Orga 
PR "1..*"-->"1" PS
Ap "0..*"-->"0..1" PS
Ap "0..*"-->"1" HS 
Sc "0..*"-->"1" PS
Sl "1..*"-->"1" Sc
Sl "0..*"-->"1" HS 
Sc "1"-->"1" PR
HS "1"-->"1" Orga

@enduml