This is the CodeSystem that contains all the codes in WOF Connect Identifier CodeSystem – Slot ID (http://canonical.fhir.link/servicewell/wof-connect/identifiercodesystem/slot-id) and WOF Connect Identifier CodeSystem – Slot ID (http://canonical.fhir.link/servicewell/wof-connect/identifiercodesystem/slot-id). E.g. what you have to deal with if you get resources containing codes in either of them