This is the CodeSystem that contains codes in both ActivityDefinitionCategory (http://terminology.hl7.org/CodeSystem/activity-definition-category) and ActivityDefinitionCategory (http://terminology.hl7.org/CodeSystem/activity-definition-category).
Generated Narrative: CodeSystem a51fcf0b-5801-4baf-ad55-a337a1600c4b-507
This code system http://hl7.org/fhir/comparison/CodeSystem/a51fcf0b-5801-4baf-ad55-a337a1600c4b-507
defines codes, but no codes are represented here