description: This attribute enables the requester of this service to indicate they would like a certain specimen to be used, but if that is not available/appropriate to be used whether to have another specimen drawn, or that this test is not performed. When a specimen is referenced it is expected to be used. If it cannot be used, the decision to collect another specimen or not perform the test must be based on established policies or determined in some other agreed to way with the requester. package_name: hl7.fhir.uv.extensions.r5 derivation: constraint name: SRSpecimenSuggestion type: Extension elements: extension: index: 0 slicing: slices: reference: match: {} schema: _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: reference} index: 2 value: choices: [valueCodeableReference] index: 4 valueCodeableReference: {type: CodeableReference, choiceOf: value, index: 5} fallBackAction: match: {} schema: index: 6 extensions: {} elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: fallBackAction} index: 8 value: choices: [valueCode] index: 10 valueCode: {type: code, choiceOf: value, index: 11} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/servicerequest-specimenSuggestion'} index: 12 value: choices: [] index: 14 package_version: 5.3.0-ballot-tc extensions: reference: url: null _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: reference} index: 2 value: choices: [valueCodeableReference] index: 4 valueCodeableReference: {type: CodeableReference, choiceOf: value, index: 5} fallBackAction: url: null index: 6 extensions: {} elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: fallBackAction} index: 8 value: choices: [valueCode] index: 10 valueCode: {type: code, choiceOf: value, index: 11} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/servicerequest-specimenSuggestion base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot-tc required: [extension]