description: A number that links the content being requested with the claim item number. package_name: hl7.fhir.us.davinci-pas derivation: constraint name: ServiceLineNumber type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/davinci-pas/StructureDefinition/extension-serviceLineNumber'} index: 1 value: choices: [valuePositiveInt] index: 3 valuePositiveInt: {type: positiveInt, choiceOf: value, index: 4} package_version: 2.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-pas/StructureDefinition/extension-serviceLineNumber base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.1.0