QI-Core Implementation Guide
8.0.0-ballot - STU 8 - ballot

QI-Core Implementation Guide, published by HL7 International / Clinical Quality Information. This guide is not an authorized publication; it is the continuous build for version 8.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-qi-core/ and changes regularly. See the Directory of published versions

## Extension: QI-Core Key Element Extension

Official URL: http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement | Version: 8.0.0-ballot
Standards status: Trial-use Active as of 2023-04-03 | Maturity Level: 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 section in this IG for more information.

Context of Use

This extension may be used on the following element(s)

- Element ID: `ElementDefinition`
- Element ID: `ElementDefinition.type.targetProfile`
- Element ID: `ElementDefinition.type`

Usage info

Usages:

- Examples for this Extension: QICoreAdverseEvent, QICoreAllergyIntolerance, QICoreBodyStructure, QICoreCarePlan... Show 46 more, QICoreCareTeam, QICoreClaim, QICoreClaimResponse, QICoreCommunication, QICoreCommunicationDone, QICoreCommunicationNotDone, QICoreCommunicationRequest, QICoreConditionEncounterDiagnosis, QICoreConditionProblemsHealthConcerns, QICoreDevice, QICoreDeviceProhibited, QICoreDeviceRequest, QICoreDeviceRequested, QICoreDeviceUseStatement, QICoreDiagnosticReportLab, QICoreDiagnosticReportNote, QICoreEncounter, QICoreFamilyMemberHistory, QICoreFlag, QICoreGoal, QICoreImagingStudy, QICoreImmunization, QICoreImmunizationDone, QICoreImmunizationEvaluation, QICoreImmunizationNotDone, QICoreImmunizationRecommendation, QICoreLocation, QICoreMedicationAdministration, QICoreMedicationAdministrationDone, QICoreMedicationAdministrationNotDone, QICoreMedicationDispense, QICoreMedicationDispenseDeclined, QICoreMedicationDispenseDone, QICoreMedicationProhibited, QICoreMedicationRequest, QICoreMedicationRequested, QICoreMedicationStatement, QICoreNonPatientObservation, QICoreNutritionOrder, QICoreObservationClinicalResult, QICoreLaboratoryResultObservation, QICoreObservationScreeningAssessment, QICoreOrganization, QICorePatient, QICorePractitioner and QICorePractitionerRole

You can also check for usages in the FHIR IG Statistics

### Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions
url |  | 1..1 | uri | "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement"
value[x] |  | 1..1 | boolean | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement"
value[x] |  | 1..1 | boolean | Value of extension
Documentation for this format

#### Constraints

Id | Grade | Path(s) | Description | Expression
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Simple Extension with the type boolean: 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 section in this IG for more information.

Maturity: 4

Differential ViewDifferential View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions
url |  | 1..1 | uri | "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement"
value[x] |  | 1..1 | boolean | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement"
value[x] |  | 1..1 | boolean | Value of extension
Documentation for this format

#### Constraints

Id | Grade | Path(s) | Description | Expression
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Simple Extension with the type boolean: 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 section in this IG for more information.

Maturity: 4

Other representations of profile: CSV, Excel, Schematron