description: Points to the Observation, AllergyIntolerance or other record that provides additional supporting information about this particular flag. package_name: NHSDigital.FHIR.STU3 derivation: constraint name: flag-detail type: Extension elements: url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/flag-detail'} index: 0 valueReference: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/Resource'] index: 1 slicing: slices: valueReference: match: {} schema: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/Resource'] index: 1 package_version: 1.0.0 class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/flag-detail base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0