hl7.fhir.uv.subscriptions-backport.r4SubscriptionsR5Backporthttp://hl7.org/fhir/uv/subscriptions-backport/ImplementationGuide/hl7.fhir.uv.subscriptions-backportThe Subscription R5 Backport Implementation Guide enables servers running versions of FHIR earlier than R5 to implement a subset of R5 Subscriptions in a standardized way.
