This is the CodeSystem that contains all the codes in Artifact Identifier Type Codes (http://terminology.hl7.org/CodeSystem/artifact-identifier-type) and Artifact Identifier Type Codes (http://terminology.hl7.org/CodeSystem/artifact-identifier-type). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 4c05a9f5-c5c6-415b-bc13-3335b255c8a0-74
This code system http://hl7.org/fhir/comparison/CodeSystem/4c05a9f5-c5c6-415b-bc13-3335b255c8a0-74 defines codes, but no codes are represented here