description: This profile defines how to represent Specimen Additive Substances in HL7 FHIR for the purpose of this guide. package_name: ch.fhir.ig.ch derivation: constraint name: SpecimenAdditiveSubstance type: Substance elements: code: binding: {strength: preferred, valueSet: 'http://hl7.eu/fhir/laboratory/ValueSet/lab-specimenAdditive-eu-lab'} index: 0 package_version: lab-report-1.0.0-ballot class: profile kind: resource url: http://fhir.ch/ig/ch-lab-report/StructureDefinition/specimen-additive-substance-eu-lab base: http://hl7.org/fhir/StructureDefinition/Substance version: 1.0.0-ballot