Name	Flags	Card.	Type	Description & Constraints
Subscription	TU		DomainResource	Notification about a SubscriptionTopic Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
identifier	Σ	0..*	Identifier	Additional identifiers (business identifier)
name	Σ	0..1	string	Human readable name for this subscription
status	?! Σ	1..1	code	requested | active | error | off | entered-in-error Subscription Status ( Required)
topic	Σ	1..1	canonical( SubscriptionTopic)	Reference to the subscription topic being subscribed to
contact	Σ	0..*	ContactPoint	Contact details for source (e.g. troubleshooting)
end	Σ	0..1	instant	When to automatically delete the subscription
managingEntity	Σ	0..1	Reference( CareTeam | HealthcareService | Organization | RelatedPerson | Patient | Practitioner | PractitionerRole)	Entity responsible for Subscription changes
reason	Σ	0..1	string	Description of why this subscription was created
filterBy	Σ	0..*	BackboneElement	Criteria for narrowing the subscription topic stream
resourceType	Σ	0..1	uri	Allowed Data type or Resource (reference to definition) for this Subscription All FHIR Types ( Extensible)
filterParameter	Σ	1..1	string	Filter label defined in SubscriptionTopic
modifier	Σ	0..1	code	= | eq | ne | gt | lt | ge | le | sa | eb | ap | above | below | in | not-in | of-type Subscription Search Modifier ( Required)
value	Σ	1..1	string	Literal value or resource path
channelType	Σ	1..1	Coding	Channel type for notifications Subscription Channel Type ( Extensible)
endpoint	Σ	0..1	url	Where the channel points to
header	Σ	0..*	string	Usage depends on the channel type
heartbeatPeriod	Σ	0..1	unsignedInt	Interval in seconds to send 'heartbeat' notification
timeout	Σ	0..1	unsignedInt	Timeout in seconds to attempt notification delivery
contentType	Σ	0..1	code	MIME type to send, or omit for no payload Mime Types ( Required)
content	Σ	0..1	code	empty | id-only | full-resource SubscriptionPayloadContent ( Required)
maxCount	Σ	0..1	positiveInt	Maximum number of triggering resources included in notification bundles
Documentation for this format