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5.3.11.4 Operation $versions on CapabilityStatement

FHIR Infrastructure Work Group

Maturity Level: 5

Trial Use

Compartments: N/A

Using the FHIR Version Mime Type Parameter, a server can support multiple versions on the same end-point. The only way for client to find out what versions a server supports in this fashion is the $versions operation. The client invokes the operation with no parameters. and the server returns the list of supported versions, along with the default version it will use if no fhirVersion parameter is present.

The canonical URL for this operation definition is

 http://hl7.org/fhir/OperationDefinition/CapabilityStatement-versions

Formal Definition (as a OperationDefinition).

URL: [base]/$versions

This is an idempotent operation

Out Parameters:
Name	Scope	Cardinality	Type	Binding	Profile	Documentation
version		1..*	code			A version supported by the server. Use the major.minor version like 3.0
default		1..1	code	FHIRVersion (Required)		The default version for the server. Use the major.minor version like 3.0

5.3.11.4.1 Examples

Request: Request a list of versions supported by the server

GET [base]/$versions
Accept: application/fhir+xml
[other headers]

---

Response:

HTTP/1.1 200 OK
[other headers]

<Parameters xmlns="http://hl7.org/fhir">
  <parameter>
		<name value="version"/>
		<valueCode value="3.0"/>
  </parameter>
	<parameter>
		<name value="version"/>
		<valueCode value="4.0"/>
	</parameter>
	<parameter>
		<name value="default"/>
		<valueCode value="4.0"/>
	</parameter>
</Parameters>

or in JSON:

{
	"resourceType": "Parameters",
	"parameter": [{
  	"name": "version",
  	"valueCode": "3.0"
	}, {
	  "name": "version",
	  "valueCode": "4.0"
	}, {
	  "name": "default",
	  "valueCode": "4.0"
	}]
}

For the convenience of clients, servers that implement this operation SHALL also support the relevant XML or JSON format:

Request: Request a list of versions supported by the server

GET [base]/$versions
Accept: application/json
[other headers]

or

GET [base]/$versions
Accept: application/xml
[other headers]

---

Response:

HTTP/1.1 200 OK
[other headers]

{
	"versions": ["3.0", "4.0"],
	"default" : "4.0"
}

on in XML:

<versions>
  <version>3.0</version>
  <version>4.0</version>
  <default>4.0</default>
</versions>

 

For more information about operations, including how they are invoked, see Operations.