description: An example URL used to refer to examples associated with this actor. This is used when an IG describes a federated system with multiple servers playing the roles of different actors. Note that this is for example references, and has no impact on the canonical URLs defined by the IG package_name: hl7.fhir.uv.tools.r5 derivation: constraint name: ActorExampleURL type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/ig-actor-example-url'} 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/ig-actor-example-url base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.4.0 required: [value, valueUrl]