NameFlagsCard.TypeDescription & Constraintsdoco
.. Subscription TUDomainResourceNotification about a SubscriptionTopic

Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
... identifier Σ0..*IdentifierAdditional identifiers (business identifier)

... name Σ0..1stringHuman readable name for this subscription
... status ?!Σ1..1coderequested | active | error | off | entered-in-error
Subscription Status (Required)
... topic Σ1..1canonical(SubscriptionTopic)Reference to the subscription topic being subscribed to
... contact Σ0..*ContactPointContact details for source (e.g. troubleshooting)

... end Σ0..1instantWhen to automatically delete the subscription
... managingEntity Σ0..1Reference(CareTeam | HealthcareService | Organization | RelatedPerson | Patient | Practitioner | PractitionerRole)Entity responsible for Subscription changes
... reason Σ0..1stringDescription of why this subscription was created
... filterBy Σ0..*BackboneElementCriteria for narrowing the subscription topic stream

.... resourceType Σ0..1uriAllowed Data type or Resource (reference to definition) for this Subscription
All FHIR Types (Extensible)
.... filterParameter Σ1..1stringFilter label defined in SubscriptionTopic
.... modifier Σ0..1code= | eq | ne | gt | lt | ge | le | sa | eb | ap | above | below | in | not-in | of-type
Subscription Search Modifier (Required)
.... value Σ1..1stringLiteral value or resource path
... channelType Σ1..1CodingChannel type for notifications
Subscription Channel Type (Extensible)
... endpoint Σ0..1urlWhere the channel points to
... header Σ0..*stringUsage depends on the channel type

... heartbeatPeriod Σ0..1unsignedIntInterval in seconds to send 'heartbeat' notification
... timeout Σ0..1unsignedIntTimeout in seconds to attempt notification delivery
... contentType Σ0..1codeMIME type to send, or omit for no payload
Mime Types (Required)
... content Σ0..1codeempty | id-only | full-resource
SubscriptionPayloadContent (Required)
... maxCount Σ0..1positiveIntMaximum number of triggering resources included in notification bundles

doco Documentation for this format