backport-channel-typeBackportChannelTypehttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-channel-typeAdditional channel types not defined before FHIR R5.backport-filter-criteriaBackportFilterCriteriahttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-filter-criteriaCriteria for topic-based filtering (filter-by).backport-heartbeat-periodBackportHeartbeatPeriodhttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-heartbeat-periodInterval in seconds to send 'heartbeat' notifications.backport-max-countBackportMaxCounthttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-max-countMaximum number of triggering resources included in notification bundles.backport-payload-contentBackportPayloadContenthttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-payload-contentHow much of the resource content to deliver in the notification payload. The choices are an empty payload, only the resource id, or the full resource content.backport-subscriptionBackportSubscriptionhttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscriptionProfile on the Subscription resource to enable R5-style topic-based subscriptions in FHIR R4 or R4B.backport-subscription-notificationBackportSubscriptionNotificationhttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notificationProfile on the R4B Bundle resource to enable R5-style topic-based subscription notifications in FHIR R4B.backport-subscription-notification-r4BackportSubscriptionNotificationR4http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4Profile on the R4 Bundle resource to enable R5-style topic-based subscription notifications in FHIR R4.backport-subscription-status-r4BackportSubscriptionStatusR4http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-status-r4Profile on Parameters for topic-based subscription notifications in R4.backport-timeoutBackportTimeouthttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-timeoutTimeout in seconds to attempt notification delivery.capabilitystatement-subscriptiontopic-canonicalCapabilityStatementSubscriptionTopichttp://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/capabilitystatement-subscriptiontopic-canonicalExtension used to advertise supported SubscriptionTopic canonical URLs in a CapabilityStatement.