http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement|8.0.0-ballot

**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.
Base: http://hl7.org/fhir/StructureDefinition/Extension4.0.1, 5.0.0, 4.0.1
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 0
Elements