STU Update Publication of HL7 FHIR® Implementation Guide: Data Exchange for Quality Measures, STU3.1 for FHIR R4 – US Realm
See the specification at
http://hl7.org/fhir/us/davinci-deqm/STU3.1/ or learn more at https://www.hl7.org/implement/standards/product_brief.cfm?product_id=520