backport-subscription-serverBackportSubscriptionCapabilityStatementhttp://hl7.org/fhir/uv/subscriptions-backport/CapabilityStatement/backport-subscription-serverCapabilityStatement describing the required and optional capabilities of a FHIR Server supporting backported R5 Subscriptions in R4B.backport-subscription-server-r4BackportSubscriptionCapabilityStatementR4http://hl7.org/fhir/uv/subscriptions-backport/CapabilityStatement/backport-subscription-server-r4CapabilityStatement describing the required and optional capabilities of a FHIR Server supporting backported R5 Subscriptions in R4.metadataCapabilitiesR4Bhttps://subscriptions.argo.run/fhir/r4b/CapabilityStatement/metadata