ResearchElementDefinition resource (FHIR R4)

ResearchElementDefinition is the FHIR R4 resource for the ResearchElementDefinition resource describes a "PICO" element that knowledge (evidence, assertion, recommendation) is about.

Resource	ResearchElementDefinition
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/ResearchElementDefinition
Required elements	status (1..1), type (1..1), characteristic (1..*)

Example

{
  "resourceType": "ResearchElementDefinition",
  "id": "researchelementdefinition-08ac8f400210156913fa8ff927ceb74e",
  "status": "draft",
  "type": "population",
  "characteristic": [
    {
      "definitionCodeableConcept": {
        "text": "Synthetic value"
      }
    }
  ]
}

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

Validation context

strict pidgeon validate grades a ResearchElementDefinition 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 ResearchElementDefinition

Wire it into your AI agent:

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

Download Post free to browse this reference with generation attached.