This is the CodeSystem that contains all the codes in MedicationKnowledge Characteristic Codes (http://terminology.hl7.org/CodeSystem/medicationknowledge-characteristic) and MedicationKnowledge Characteristic Codes (http://terminology.hl7.org/CodeSystem/medicationknowledge-characteristic). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem ce29e8c3-bf6b-4db3-8fa6-fd314711d268-590
This code system http://hl7.org/fhir/comparison/CodeSystem/ce29e8c3-bf6b-4db3-8fa6-fd314711d268-590 defines codes, but no codes are represented here