description: Extension to capture photos, documents and files that relate to a HealthcareService package_name: ca.on.oh-ereferral-econsult derivation: constraint name: Media type: Extension elements: url: pattern: {type: Uri, value: 'http://ehealthontario.ca/fhir/StructureDefinition/ext-media'} index: 0 value: choices: [valueAttachment] index: 2 valueAttachment: {type: Attachment, choiceOf: value, index: 3} package_version: 0.11.0-alpha-1.0.1 class: extension kind: complex-type url: http://ehealthontario.ca/fhir/StructureDefinition/ext-media base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0