{description: A set of codes that define a specific instruction for a receiver of a message., package_name: fhir.r4.ukcore.stu3.currentbuild, name: UKCoreMessageHeaderInstruction, type: null, package_version: 0.23.0-pre-release, class: unknown, kind: null, url: 'https://fhir.hl7.org.uk/CodeSystem/UKCore-MessageHeaderInstruction', version: 1.0.0}