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

This is the base resource type for everything.
{
  "description": "This is the base resource type for everything.",
  "package": "hl7.fhir.r4.core@4.0.1",
  "date": "2019-10-31T22:29:23Z",
  "derivation": null,
  "meta": {
    "lastUpdated": "2019-11-01T09:29:23.356+11:00"
  },
  "publisher": "Health Level Seven International (FHIR Infrastructure)",
  "fhirVersion": "4.0.1",
  "name": "Resource",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": true,
  "type": "Resource",
  "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"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 5
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fhir"
  } ],
  "status": "active",
  "id": "631245e0-b32a-5b12-bbd4-e7fedc4b781a",
  "kind": "resource",
  "url": "http://hl7.org/fhir/StructureDefinition/Resource",
  "identifier": null,
  "versionAlgorithmString": null,
  "fhir_id": null,
  "version": "4.0.1",
  "contact": [ {
    "telecom": [ {
      "value": "http://hl7.org/fhir",
      "system": "url"
    } ]
  }, {
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/fiwg/index.cfm",
      "system": "url"
    } ]
  } ],
  "baseDefinition": null
}