description: This profile constrains the Observation resource to represent the blood group. package_name: ch.fhir.ig.ch-epreg derivation: constraint name: ChEpregObservationBloodGroup type: Observation elements: code: pattern: type: CodeableConcept value: coding: - {code: '365636006', system: 'http://snomed.info/sct'} type: CodeableConcept index: 0 subject: {index: 1} effective: choices: [effectiveDateTime] index: 3 effectiveDateTime: {type: dateTime, choiceOf: effective, index: 4} performer: {index: 5} value: choices: [valueCodeableConcept] index: 7 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 8} package_version: 1.0.0-ballot class: profile kind: resource url: http://fhir.ch/ig/ch-epreg/StructureDefinition/ch-epreg-observation-blood-group base: http://fhir.ch/ig/ch-epreg/StructureDefinition/ch-epreg-observation-results-lab version: 1.0.0-ballot required: [value, valueCodeableConcept]