This is the CodeSystem that contains all the codes in LibraryType (http://terminology.hl7.org/CodeSystem/library-type) and LibraryType (http://terminology.hl7.org/CodeSystem/library-type). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem b39d974e-2b72-42ac-95a6-171d2985af14-533
This code system http://hl7.org/fhir/comparison/CodeSystem/b39d974e-2b72-42ac-95a6-171d2985af14-533 defines codes, but no codes are represented here