ResearchDefinition resource (FHIR R4)

ResearchDefinition is the FHIR R4 resource for the ResearchDefinition resource describes the conditional state (population and any exposures being compared within the population) and outcome (if specified) that the knowledge (evidence, assertion, recommendation) is about.

Resource	ResearchDefinition
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/ResearchDefinition
Required elements	status (1..1), population (1..1)

Example

{
  "resourceType": "ResearchDefinition",
  "id": "researchdefinition-cf6590cd3c58fb86334c9e64b4934dcb",
  "status": "draft",
  "population": {
    "reference": "ResearchElementDefinition/researchelementdefinition-44c980fb318b9ac414ed5645792cd6d0"
  }
}

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

Validation context

strict pidgeon validate grades a ResearchDefinition 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 ResearchDefinition

Wire it into your AI agent:

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

Download Post free to browse this reference with generation attached.