http://hl7.org/fhir/StructureDefinition/cqf-qualityOfEvidence|4.0.1

The quality of the evidence described. The code system used specifies the quality scale used to grade this evidence source while the code specifies the actual quality score (represented as a coded value) associated with the evidence.
description: The quality of the evidence described. The code system used specifies the quality scale used to grade this evidence source while the code specifies the actual quality score (represented as a coded value) associated with the evidence.
derivation: constraint
name: qualityOfEvidence
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/cqf-qualityOfEvidence'}
    index: 1
  value:
    choices: []
    index: 3
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/cqf-qualityOfEvidence
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.1
required: [value]