description: '**This extension is only used in the US Core Implementation Guide''''s Profile StructureDefinition elements.**  It flags elements that are *Additional* USCDI Requirements for certified systems. In other words, elements that are not marked as Must Support but are required for ONC Health IT certification testing. See the [Conformance page](general-requirements.html) for more information.'
package_name: hl7.fhir.us.core
derivation: constraint
name: USCDIRequirement
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement'}
    index: 0
  value:
    choices: [valueBoolean]
    index: 2
  valueBoolean: {type: boolean, choiceOf: value, index: 3}
package_version: 8.0.0-ballot
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 8.0.0-ballot
required: [value, valueBoolean]