description: This extension is used to sign FHIR knowledge artifacts, ensuring their integrity and authenticity. package_name: hl7.fhir.uv.crmi derivation: constraint name: CRMIArtifactSignature type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/uv/crmi/StructureDefinition/crmi-artifact-signature'} type: uri index: 1 value: choices: [valueSignature] index: 3 valueSignature: {type: Signature, choiceOf: value, index: 4} package_version: 2.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/crmi/StructureDefinition/crmi-artifact-signature base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-ballot