This page is part of the FHIR Specification (v4.2.0: R5 Preview #1). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions 
| FHIR Infrastructure Work Group | Maturity Level: N/A | Standards Status: Informative | Compartments: Not linked to any defined compartments |
Raw JSON (canonical form + also see JSON Format Specification)
Example of a Subscription Heartbeat message (message with no event)
{
"resourceType": "Bundle",
"id": "heartbeat",
"meta": {
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/subscription-event-count",
"valueUnsignedInt": 20
},
{
"url": "http://hl7.org/fhir/StructureDefinition/bundle-event-count",
"valueUnsignedInt": 0
},
{
"url": "http://hl7.org/fhir/StructureDefinition/subscription-status",
"valueCode": "active"
},
{
"url": "http://hl7.org/fhir/StructureDefinition/subscription-topic-url",
"valueUrl": "https://example.org/baseR4/Topic/admission"
},
{
"url": "http://hl7.org/fhir/StructureDefinition/subscription-url",
"valueUrl": "https://example.org/Subscription/cb2dce51-a1f5-40b4-a98b-c934eae368e8"
}
]
},
"type": "history",
"timestamp": "2019-08-07T10:24:13.1882432-05:00"
}
Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.