This is the CodeSystem that contains all the codes in IG Parameters CDA Validation (http://hl7.org/cda/stds/core/CodeSystem/IGParametersCDAValidation) and IG Parameters CDA Validation (http://hl7.org/cda/stds/core/CodeSystem/IGParametersCDAValidation). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 72d9804f-86ea-4f33-960e-18503ab6a837-5
This code system http://hl7.org/fhir/comparison/CodeSystem/72d9804f-86ea-4f33-960e-18503ab6a837-5 defines codes, but no codes are represented here