http://hl7.org/fhir/StructureDefinition/Subscription|4.0.1

The subscription resource is used to define a push-based subscription from a server to another system. Once a subscription is registered with the server, the server checks every resource that is created or updated, and if the resource matches the given criteria, it sends a message on the defined \"channel\" so that another system can take an appropriate action.
element_idtypes
Subscription
Subscription.status
Subscription.contact
Subscription.end
Subscription.reason
Subscription.criteria
Subscription.error
Subscription.channel
Subscription.channel.type
Subscription.channel.endpoint
Subscription.channel.payload
Subscription.channel.header
Subscription
Subscription.id
Subscription.meta
Subscription.implicitRules
Subscription.language
Subscription.text
Subscription.contained
Subscription.extension
Subscription.modifierExtension
Subscription.status
Subscription.contact
Subscription.end
Subscription.reason
Subscription.criteria
Subscription.error
Subscription.channel
Subscription.channel.id
Subscription.channel.extension
Subscription.channel.modifierExtension
Subscription.channel.type
Subscription.channel.endpoint
Subscription.channel.payload
Subscription.channel.header