OperationDefinition resource (FHIR R4)

OperationDefinition is the FHIR R4 resource for a formal computable definition of an operation (on the RESTful interface) or a named query (using the search interaction).

Resource	OperationDefinition
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/OperationDefinition
Required elements	name (1..1), status (1..1), kind (1..1), code (1..1), system (1..1), type (1..1), instance (1..1)

Example

{
  "resourceType": "OperationDefinition",
  "id": "operationdefinition-b4124cd840d15ac8ab62b6bcfe4aecbf",
  "name": "Synthetic value",
  "status": "draft",
  "kind": "operation",
  "code": "synthetic",
  "system": true,
  "type": true,
  "instance": true
}

Generated by the Pidgeon engine: pidgeon generate OperationDefinition --seed 20260722.

Validation context

strict pidgeon validate grades a OperationDefinition instance against the base R4 structure definition: missing required elements raise REQUIRED_FIELD_MISSING and cardinality violations raise CARDINALITY_MIN or CARDINALITY_MAX.(REQUIRED_FIELD_MISSING)

This answer, in your terminal

pidgeon lookup OperationDefinition

Wire it into your AI agent:

claude mcp add pidgeon -- npx -y @pidgeonhealth/mcp

Download Post free to browse this reference with generation attached.