description: Chromosomal phase set identifier (UUID/OID). All sequences with the same PhaseSet identifier are asserted to be on the same chromosome (cis). package_name: hl7.fhir.r3.examples derivation: constraint name: PhaseSet type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/observation-geneticsPhaseSet'} index: 1 valueUri: {type: uri, index: 2} package_version: 3.0.2 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/observation-geneticsPhaseSet base: http://hl7.org/fhir/StructureDefinition/Extension version: null