{
  "description": null,
  "_filename": "DataElement-Questionnaire.item.enableWhen.json",
  "package_name": "hl7.fhir.r3.examples",
  "date": null,
  "meta": {
    "lastUpdated": "2017-04-19T07:44:43.294+10:00"
  },
  "publisher": null,
  "element": [ {
    "constraint": [ {
      "key": "ele-1",
      "human": "All FHIR elements must have a @value or children",
      "xpath": "@value|f:*|h:div",
      "source": "Element",
      "severity": "error",
      "expression": "hasValue() | (children().count() > id.count())"
    }, {
      "key": "que-7",
      "human": "enableWhen must contain either a 'answer' or a 'hasAnswer' element",
      "xpath": "count(f:*[starts-with(local-name(.), 'answer')]|self::f:hasAnswer) = 1",
      "severity": "error",
      "expression": "hasAnswer.exists() xor answer.exists()"
    } ],
    "path": "Questionnaire.item.enableWhen",
    "requirements": "Allows questionnaires to adapt based on answers to other questions. E.g. If physical gender is specified as a male, no need to capture pregnancy history.  Also allows conditional display of instructions or groups of questions.",
    "min": 0,
    "definition": "A constraint indicating that this item should only be enabled (displayed/allow answers to be captured) when the specified condition is true.",
    "isModifier": true,
    "short": "Only allow data when",
    "mapping": [ {
      "map": "N/A - MIF rather than RIM level",
      "identity": "rim"
    } ],
    "type": [ {
      "code": "BackboneElement"
    } ],
    "max": "*",
    "id": "Questionnaire.item.enableWhen",
    "comment": "If multiple repetitions of this extension are present, the item should be enabled when the condition for *any* of the repetitions is true.  I.e. treat \"enableWhen\"s as being joined by an \"or\" clause.\n\nThis element is a modifier because if enableWhen is present for an item, \"required\" is ignored unless one of the enableWhen conditions is met.",
    "isSummary": true
  } ],
  "name": null,
  "type": null,
  "experimental": "true",
  "resourceType": "DataElement",
  "title": null,
  "package_version": "3.0.2",
  "status": "draft",
  "id": "4be4e122-2063-49a7-98b8-1dd54462d26f",
  "kind": null,
  "url": "http://hl7.org/fhir/DataElement/Questionnaire.item.enableWhen",
  "stringency": "fully-specified",
  "version": null
}