description: Classifies the contents of a message. package_name: ca.on.oh-ereferral-econsult derivation: constraint name: ContentType type: Extension elements: url: pattern: {type: Uri, value: 'http://ehealthontario.ca/fhir/StructureDefinition/ext-content-type'} index: 0 value: choices: [valueCode] index: 2 valueCode: {type: code, choiceOf: value, index: 3} package_version: 0.11.0-alpha1.0.6 class: extension kind: complex-type url: http://ehealthontario.ca/fhir/StructureDefinition/ext-content-type base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0