Citation has `Citation.status` which has required binding to PublicationStatus valueset.

Citation also has `Citation.citedArtifact.currentState` which has extensible binding to CitedArtifactStatusType valueset.

The codes between two valueset are not totally aligned which is understandable.

That bring a problem that when Citation cites another Citation, the status of cited Citation could not be mapped to citedArtifact.currentState completely. Since PublicationStatus is widely used by many FHIR resources, I think this would a common problem when Citation cites another FHIR resources.

citedArtifact.currentState is a extensible binding which means that additional code could be used if not available but this is not a optimized solution.

I recommend that definition of CitedArtifactStatusType should be updated to include values from both code systems:

• Include all codes defined in http://terminology.hl7.org/CodeSystem/cited-artifact-status-type
• Include all codes defined in http://hl7.org/fhir/publication-status

There are some overlaps between these two code systems but I think those could be addressed easily.