description: null package_name: ca.on.erec.r4 derivation: constraint name: HTTPHeaderDestination type: Extension elements: url: pattern: {type: Uri, value: 'http://ehealthontario.ca/fhir/StructureDefinition/ext-http-header-destination'} index: 0 value: choices: [valueString] index: 2 valueString: {type: string, choiceOf: value, index: 3} package_version: 0.12.4-snapshot1 class: extension kind: complex-type url: http://ehealthontario.ca/fhir/StructureDefinition/ext-http-header-destination base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.1.0