description: 'This extension is for canonical resources to indicate where a human readable web page describing the resource can be found, if it''s at a different location to the canonical URL itself. Todo: This might be considered for moving to the core extensions pack' package_name: hl7.fhir.uv.tools.r5 derivation: constraint name: WebSource type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/web-source'} index: 1 value: choices: [valueUrl] index: 3 valueUrl: {type: url, choiceOf: value, index: 4} package_version: 0.4.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/tools/StructureDefinition/web-source base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.4.0 required: [value, valueUrl]