{
  "resourceType": "CodeSystem",
  "id": "codesystem-hierarchy-meaning",
  "meta": {
    "lastUpdated": "2019-11-01T09:29:23.356+11:00"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "vocab"
    },
    {
      "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/codesystem-hierarchy-meaning",
  "identifier": [
    {
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:2.16.840.1.113883.4.642.4.785"
    }
  ],
  "version": "4.0.1",
  "name": "CodeSystemHierarchyMeaning",
  "title": "CodeSystemHierarchyMeaning",
  "status": "active",
  "experimental": false,
  "date": "2019-11-01T09:29:23+11:00",
  "publisher": "HL7 (FHIR Project)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/fhir"
        },
        {
          "system": "email",
          "value": "fhir@lists.hl7.org"
        }
      ]
    }
  ],
  "description": "The meaning of the hierarchy of concepts in a code system.",
  "caseSensitive": true,
  "valueSet": "http://hl7.org/fhir/ValueSet/codesystem-hierarchy-meaning",
  "content": "complete",
  "concept": [
    {
      "code": "grouped-by",
      "display": "Grouped By",
      "definition": "No particular relationship between the concepts can be assumed, except what can be determined by inspection of the definitions of the elements (possible reasons to use this: importing from a source where this is not defined, or where various parts of the hierarchy have different meanings)."
    },
    {
      "code": "is-a",
      "display": "Is-A",
      "definition": "A hierarchy where the child concepts have an IS-A relationship with the parents - that is, all the properties of the parent are also true for its child concepts. Not that is-a is a property of the concepts, so additional subsumption relationships may be defined using properties or the [subsumes](extension-codesystem-subsumes.html) extension."
    },
    {
      "code": "part-of",
      "display": "Part Of",
      "definition": "Child elements list the individual parts of a composite whole (e.g. body site)."
    },
    {
      "code": "classified-with",
      "display": "Classified With",
      "definition": "Child concepts in the hierarchy may have only one parent, and there is a presumption that the code system is a \"closed world\" meaning all things must be in the hierarchy. This results in concepts such as \"not otherwise classified.\"."
    }
  ]
}