description: System indicating the type of the value package_name: hl7.fhir.be.mycarenet derivation: constraint name: BeExtSystem type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'https://www.ehealth.fgov.be/standards/fhir/mycarenet/StructureDefinition/be-ext-system'} type: uri index: 1 value: mustSupport: true choices: [valueUri] index: 3 valueUri: {type: uri, mustSupport: true, choiceOf: value, index: 4} package_version: 2.1.1 extensions: {} class: extension kind: complex-type url: https://www.ehealth.fgov.be/standards/fhir/mycarenet/StructureDefinition/be-ext-system base: http://hl7.org/fhir/StructureDefinition/Extension|4.0.1 version: 2.1.1 required: [value, valueUri]