description: The CQL namespace URI of the CQL library. For Library resources packaged in FHIR NPM Packages, this SHALL be the base canonical of the package. package_name: hl7.fhir.uv.cql derivation: constraint name: CQLNamespaceURI type: Extension elements: url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespaceUri'} index: 0 value: choices: [valueUri] index: 2 valueUri: {type: uri, choiceOf: value, index: 3} package_version: 3.0.0-ballot class: extension kind: complex-type url: http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespaceUri base: http://hl7.org/fhir/StructureDefinition/Extension version: 3.0.0-ballot required: [valueUri, value]