# QI-Core Key Element Extension - QI-Core Implementation Guide v7.0.2

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **QI-Core Key Element Extension**

## Extension: QI-Core Key Element Extension 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement | *Version*:7.0.2 | |
| * Standards status: *[Trial-use](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](http://hl7.org/fhir/versions.html#maturity): 4 | *Computable Name*:QICORE_KeyElement |
| **Copyright/Legal**: Used by permission of HL7 International, all rights reserved Creative Commons License | | |

**This extension is only used in the QI-Core Implementation Guide's Profile StructureDefinition elements.** It flags elements that the quality improvement community has identified as significant to express the full intent of measures or decision support artifacts. See the [MustSupport Flag](index.md#mustsupport-flag) section in this IG for more information.

**Context of Use**

**Usage info**

**Usages:**

* Examples for this Extension: [QICoreAdverseEvent](StructureDefinition-qicore-adverseevent.md), [QICoreAllergyIntolerance](StructureDefinition-qicore-allergyintolerance.md), [QICoreBodyStructure](StructureDefinition-qicore-bodystructure.md), [QICoreCarePlan](StructureDefinition-qicore-careplan.md)... Show 46 more, [QICoreCareTeam](StructureDefinition-qicore-careteam.md), [QICoreClaim](StructureDefinition-qicore-claim.md), [QICoreClaimResponse](StructureDefinition-qicore-claimresponse.md), [QICoreCommunication](StructureDefinition-qicore-communication.md), [QICoreCommunicationDone](StructureDefinition-qicore-communicationdone.md), [QICoreCommunicationNotDone](StructureDefinition-qicore-communicationnotdone.md), [QICoreCommunicationRequest](StructureDefinition-qicore-communicationrequest.md), [QICoreConditionEncounterDiagnosis](StructureDefinition-qicore-condition-encounter-diagnosis.md), [QICoreConditionProblemsHealthConcerns](StructureDefinition-qicore-condition-problems-health-concerns.md), [QICoreDevice](StructureDefinition-qicore-device.md), [QICoreDeviceProhibited](StructureDefinition-qicore-deviceprohibited.md), [QICoreDeviceRequest](StructureDefinition-qicore-devicerequest.md), [QICoreDeviceRequested](StructureDefinition-qicore-devicerequested.md), [QICoreDeviceUseStatement](StructureDefinition-qicore-deviceusestatement.md), [QICoreDiagnosticReportLab](StructureDefinition-qicore-diagnosticreport-lab.md), [QICoreDiagnosticReportNote](StructureDefinition-qicore-diagnosticreport-note.md), [QICoreEncounter](StructureDefinition-qicore-encounter.md), [QICoreFamilyMemberHistory](StructureDefinition-qicore-familymemberhistory.md), [QICoreFlag](StructureDefinition-qicore-flag.md), [QICoreGoal](StructureDefinition-qicore-goal.md), [QICoreImagingStudy](StructureDefinition-qicore-imagingstudy.md), [QICoreImmunization](StructureDefinition-qicore-immunization.md), [QICoreImmunizationDone](StructureDefinition-qicore-immunizationdone.md), [QICoreImmunizationEvaluation](StructureDefinition-qicore-immunizationevaluation.md), [QICoreImmunizationNotDone](StructureDefinition-qicore-immunizationnotdone.md), [QICoreImmunizationRecommendation](StructureDefinition-qicore-immunizationrecommendation.md), [QICoreLocation](StructureDefinition-qicore-location.md), [QICoreMedicationAdministration](StructureDefinition-qicore-medicationadministration.md), [QICoreMedicationAdministrationDone](StructureDefinition-qicore-medicationadministrationdone.md), [QICoreMedicationAdministrationNotDone](StructureDefinition-qicore-medicationadministrationnotdone.md), [QICoreMedicationDispense](StructureDefinition-qicore-medicationdispense.md), [QICoreMedicationDispenseDeclined](StructureDefinition-qicore-medicationdispensedeclined.md), [QICoreMedicationDispenseDone](StructureDefinition-qicore-medicationdispensedone.md), [QICoreMedicationProhibited](StructureDefinition-qicore-medicationprohibited.md), [QICoreMedicationRequest](StructureDefinition-qicore-medicationrequest.md), [QICoreMedicationRequested](StructureDefinition-qicore-medicationrequested.md), [QICoreMedicationStatement](StructureDefinition-qicore-medicationstatement.md), [QICoreNonPatientObservation](StructureDefinition-qicore-nonpatient-observation.md), [QICoreNutritionOrder](StructureDefinition-qicore-nutritionorder.md), [QICoreObservationClinicalResult](StructureDefinition-qicore-observation-clinical-result.md), [QICoreLaboratoryResultObservation](StructureDefinition-qicore-observation-lab.md), [QICoreObservationScreeningAssessment](StructureDefinition-qicore-observation-screening-assessment.md), [QICoreOrganization](StructureDefinition-qicore-organization.md), [QICorePatient](StructureDefinition-qicore-patient.md), [QICorePractitioner](StructureDefinition-qicore-practitioner.md) and [QICorePractitionerRole](StructureDefinition-qicore-practitionerrole.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/hl7.fhir.us.qicore|current/StructureDefinition/qicore-keyelement)

### Formal Views of Extension Content

 [Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-qicore-keyelement.csv), [Excel](StructureDefinition-qicore-keyelement.xlsx), [Schematron](StructureDefinition-qicore-keyelement.sch) 

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "qicore-keyelement",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "cqi"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 4,
    "_valueInteger" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical" : "http://hl7.org/fhir/us/qicore/ImplementationGuide/us-qicore"
      }]
    }
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "trial-use",
    "_valueCode" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical" : "http://hl7.org/fhir/us/qicore/ImplementationGuide/us-qicore"
      }]
    }
  }],
  "url" : "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement",
  "version" : "7.0.2",
  "name" : "QICORE_KeyElement",
  "title" : "QI-Core Key Element Extension",
  "status" : "active",
  "date" : "2023-04-03",
  "publisher" : "HL7 International / Clinical Quality Information",
  "contact" : [{
    "name" : "Clinical Quality Information WG",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/cqi"
    }]
  }],
  "description" : "**This extension is only used in the QI-Core Implementation Guide's Profile StructureDefinition elements.** It flags elements that the quality improvement community has identified as significant to express the full intent of measures or decision support artifacts. See the [MustSupport Flag](index.html#mustsupport-flag) section in this IG for more information.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "US"
    }]
  }],
  "copyright" : "Used by permission of HL7 International, all rights reserved Creative Commons License",
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "ElementDefinition"
  },
  {
    "type" : "element",
    "expression" : "ElementDefinition.type.targetProfile"
  },
  {
    "type" : "element",
    "expression" : "ElementDefinition.type"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions",
      "definition" : "**This extension is only used on QI-Core Profile StructureDefinition elements**. It flags elements that are QI-Core Key Elements.",
      "min" : 0,
      "max" : "1",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "v2",
        "map" : "No v2 equivalent"
      },
      {
        "identity" : "rim",
        "map" : "No RIM equivalent"
      }]
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "min" : 1,
      "max" : "1",
      "type" : [{
        "code" : "boolean"
      }]
    }]
  }
}

```
