description: null package_name: uk.nhsdigital.r4 derivation: constraint name: NHSDigital-Observation type: Observation elements: identifier: index: 0 elements: system: {index: 1} value: {index: 2} required: [value, system] subject: index: 3 elements: identifier: elements: system: {index: 4} value: {index: 5} required: [value, system] effective: choices: [] index: 7 method: elements: coding: elements: system: {index: 8} code: {index: 9} display: {index: 10} required: [display, system, code] specimen: elements: identifier: elements: system: {index: 11} value: {index: 12} required: [value, system] device: elements: identifier: elements: system: {index: 13} value: {index: 14} required: [value, system] display: {index: 15} required: [display] package_version: 2.0.22-dev class: profile kind: resource url: https://fhir.nhs.uk/StructureDefinition/NHSDigital-Observation base: https://fhir.hl7.org.uk/StructureDefinition/UKCore-Observation version: null required: [identifier, subject, effective]