description: This is the MessageHeader Resource profile for the IG. package_name: hl7.fhir.us.central-cancer-registry-reporting.r4b derivation: constraint name: CentralCancerRegistryReportingMessageHeader type: MessageHeader elements: source: elements: name: {mustSupport: true, index: 0} software: {mustSupport: true, index: 1} version: {mustSupport: true, index: 2} required: [software, name, version] package_version: 1.0.0 class: profile kind: resource url: http://hl7.org/fhir/us/central-cancer-registry-reporting/StructureDefinition/central-cancer-registry-reporting-messageheader base: http://hl7.org/fhir/us/medmorph/StructureDefinition/us-ph-messageheader version: 1.0.0