description: This cross-version extension represents MedicationAdministration.reasonReference from http://hl7.org/fhir/StructureDefinition/MedicationAdministration|4.0.1 for use in FHIR R5. package_name: hl7.fhir.uv.xver derivation: constraint name: ext_R4_MedicationAdministration_reasonReference type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Condition or observation that supports why the medication was administered choices: [valueReference] index: 1 valueReference: base: {path: 'Extension.value[x]'} type: Reference short: Condition or observation that supports why the medication was administered choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Condition', 'http://hl7.org/fhir/StructureDefinition/DiagnosticReport', 'http://hl7.org/fhir/StructureDefinition/Observation'] index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-MedicationAdministration.reasonReference'} index: 3 package_version: r4.r5-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.0/StructureDefinition/extension-MedicationAdministration.reasonReference base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]