description: An assigned number on the specimen denoting the order of collection. package_name: rs/hl7.fhir.uv.extensions.r5 derivation: constraint name: SpecSequenceNumber type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/specimen-sequenceNumber'} type: uri index: 1 value: choices: [valueInteger] index: 3 valueInteger: {type: integer, choiceOf: value, index: 4} package_version: 1.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/specimen-sequenceNumber base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0 required: [value, valueInteger]