description: This cross-version extension represents ClinicalImpression.investigations.modifierExtension from http://hl7.org/fhir/StructureDefinition/ClinicalImpression|1.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r2.r4 derivation: constraint name: ext_R2_ClinicalImpression_in_modifierExtension type: Extension elements: url: pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.investigations.modifierExtension'} index: 0 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-ClinicalImpression.investigations.modifierExtension base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]