description: This extension is used to reference an associated encounter. package_name: fhir.r4.ukcore.stu2 derivation: constraint name: ExtensionUKCoreAssociatedEncounter type: Extension elements: url: pattern: {type: uri, value: 'https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AssociatedEncounter'} type: uri index: 0 value: choices: [valueReference] index: 2 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Encounter'] index: 3 package_version: 2.0.2 class: extension kind: complex-type url: https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AssociatedEncounter base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.1.0 required: [value, valueReference]