This is the CodeSystem that contains all the codes in Id Expectation Codes (http://hl7.org/fhir/tools/CodeSystem/id-expectation) and Id Expectation Codes (http://hl7.org/fhir/tools/CodeSystem/id-expectation). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 9a431223-7e5d-4775-a967-15a28887b2c2-23
This code system http://hl7.org/fhir/comparison/CodeSystem/9a431223-7e5d-4775-a967-15a28887b2c2-23
defines codes, but no codes are represented here