The draft section 4.8.15 defines implicit Code Systems for each StructureDefinition, Questionnaire, and the set of Medication Resources, but does not also define URIs for corresponding "all codes" ValueSets.

This is an issue if someone wants to, for example, specify such a ValueSet in the context of ConceptMap.source or ConceptMap.target

So, for Medication where the CodeSystem URI is [base]/Medication, the ValueSet URI might be [base]/Medication/vs