http://hl7.org/fhir/StructureDefinition/Extension|4.0.1

{
  "description": "Base StructureDefinition for Extension Type: Optional Extension Element - found in all resources.",
  "package": "hl7.fhir.r4.examples@4.0.1",
  "date": "2019-10-31T22:29:23Z",
  "derivation": "specialization",
  "meta": {
    "lastUpdated": "2019-11-01T09:29:23.356+11:00"
  },
  "publisher": "HL7 FHIR Standard",
  "fhirVersion": "4.0.1",
  "purpose": "The ability to add extensions in a structured way is what keeps FHIR resources simple.",
  "name": "Extension",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": null,
  "resourceType": "StructureDefinition",
  "fhirversion": null,
  "title": null,
  "versionAlgorithmCoding": null,
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "normative"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version",
    "valueCode": "4.0.0"
  } ],
  "status": "active",
  "id": "d43fd6ab-9b97-59b4-ae4d-d958cedab692",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/StructureDefinition/Extension",
  "identifier": null,
  "versionAlgorithmString": null,
  "fhir_id": null,
  "version": "4.0.1",
  "contact": [ {
    "telecom": [ {
      "value": "http://hl7.org/fhir",
      "system": "url"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Element"
}