description: null package_name: uk.nhsdigital.r4 derivation: constraint name: NHSDigitalObservationCOVID19 type: Observation elements: category: index: 0 slicing: slices: COVID-TestPillar: match: {} schema: {_required: true, index: 0} min: 1 code: elements: coding: index: 1 slicing: slices: snomedCT: match: {} schema: {_required: true, index: 1} min: 1 max: 1 required: [coding] subject: elements: identifier: {index: 2} required: [identifier] package_version: 2.7.0 class: profile kind: resource url: https://fhir.nhs.uk/StructureDefinition/NHSDigital-Observation-COVID19 base: https://fhir.nhs.uk/StructureDefinition/NHSDigital-Observation version: null required: [category]