NameFlagsCard.TypeDescription & Constraintsdoco
.. Subscription ΣDomainResourceA server push subscription criteria
... criteria Σ1..1stringRule for server push criteria
... contact Σ0..*ContactPointContact details for source (e.g. troubleshooting)
... reason Σ1..1stringDescription of why this subscription was created
... status ?! Σ1..1coderequested | active | error | off
SubscriptionStatus (Required)
... error Σ0..1stringLatest error note
... channel Σ1..1BackboneElementThe channel on which to report matches to the criteria
.... type Σ1..1coderest-hook | websocket | email | sms | message
SubscriptionChannelType (Required)
.... endpoint Σ0..1uriWhere the channel points to
.... payload Σ1..1stringMimetype to send, or blank for no payload
.... header Σ0..1stringUsage depends on the channel type
... end Σ0..1instantWhen to automatically delete the subscription
... tag Σ0..*CodingA tag to add to matching resources
SubscriptionTag (Example)

doco Documentation for this format