description: Provides clarity on the type of observation represented in the hasMember structure. package_name: rs/hl7.fhir.uv.extensions.r3 derivation: constraint name: ObservationStructureType type: Extension elements: url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/observation-structure-type'} type: uri index: 0 value: choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3} package_version: 5.2.0 class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/observation-structure-type base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [value, valueCodeableConcept]