{
  "description": null,
  "_filename": "DataElement-NamingSystem.json",
  "package_name": "hl7.fhir.r3.elements",
  "date": null,
  "meta": {
    "lastUpdated": "2019-10-24T11:53:00+11:00"
  },
  "publisher": null,
  "element": [ {
    "id": "NamingSystem",
    "max": "*",
    "min": 0,
    "path": "NamingSystem",
    "short": "System of unique identification",
    "mapping": [ {
      "map": "Entity. Role, or Act",
      "identity": "rim"
    }, {
      "map": "N/A",
      "identity": "v2"
    }, {
      "map": "N/A",
      "identity": "rim"
    }, {
      "map": "conformance.terminology",
      "identity": "w5"
    } ],
    "constraint": [ {
      "key": "dom-2",
      "human": "If the resource is contained in another resource, it SHALL NOT contain nested Resources",
      "xpath": "not(parent::f:contained and f:contained)",
      "source": "DomainResource",
      "severity": "error",
      "expression": "contained.contained.empty()"
    }, {
      "key": "dom-1",
      "human": "If the resource is contained in another resource, it SHALL NOT contain any narrative",
      "xpath": "not(parent::f:contained and f:text)",
      "source": "DomainResource",
      "severity": "error",
      "expression": "contained.text.empty()"
    }, {
      "key": "dom-4",
      "human": "If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated",
      "xpath": "not(exists(f:contained/*/f:meta/f:versionId)) and not(exists(f:contained/*/f:meta/f:lastUpdated))",
      "source": "DomainResource",
      "severity": "error",
      "expression": "contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()"
    }, {
      "key": "dom-3",
      "human": "If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource",
      "xpath": "not(exists(for $id in f:contained/*/@id return $id[not(ancestor::f:contained/parent::*/descendant::f:reference/@value=concat('#', $id))]))",
      "source": "DomainResource",
      "severity": "error",
      "expression": "contained.where(('#'+id in %resource.descendants().reference).not()).empty()"
    }, {
      "key": "nsd-1",
      "human": "Root systems cannot have uuid identifiers",
      "xpath": "not(f:kind/@value='root' and f:uniqueId/f:type/@value='uuid')",
      "severity": "error",
      "expression": "kind != 'root' or uniqueId.type = 'uuid'"
    }, {
      "key": "nsd-3",
      "human": "Can only have replacedBy if naming system is retired",
      "xpath": "not(f:replacedBy) or f:status/@value='retired'",
      "severity": "error",
      "expression": "replacedBy.empty() or status = 'retired'"
    }, {
      "key": "nsd-2",
      "human": "Can't have more than one preferred identifier for a type",
      "xpath": "not(exists(for $type in distinct-values(f:uniqueId/f:type/@value) return if (count(f:uniqueId[f:type/@value=$type and f:preferred/@value=true()])>1) then $type else ()))",
      "severity": "error",
      "expression": "uniqueId.where(preferred = true).select(type).isDistinct()"
    } ],
    "definition": "A curated namespace that issues unique symbols within that namespace for the identification of concepts, people, devices, etc.  Represents a \"System\" used within the Identifier and Coding data types."
  } ],
  "name": null,
  "type": null,
  "experimental": "true",
  "resourceType": "DataElement",
  "title": null,
  "package_version": "3.0.2",
  "status": "draft",
  "id": "5b528c1b-7a7d-4860-a5c0-3b02ab8dca2d",
  "kind": null,
  "url": "http://hl7.org/fhir/DataElement/NamingSystem",
  "stringency": "fully-specified",
  "version": null
}