Quality Measure IG change request https://jira.hl7.org/browse/FHIR-43791, applies more broadly than quality measures and should be considered for CRMI.

Who should be adding these flags and what are they intended to convey. Is it used by measure developers / packaging software to highlight data requirements (filters) for the initial population specifically, or is it intended to be used by systems exposing the data for a measure to give a hint to data gathering services on how best to winnow down the set of relevant subjects? Or is there another intended use? Which ever it is, make it explicit in the definition of the extension.