A source concept which identifies origination as a congenital or acquired condition will be mapped to a target of congenital or acquired classification should one exist (mapCategoryId=, mapRule=NULL).

If a source concept is general (i.e. does not specify congenital or acquired) and only specific targets exist, the ICD-10 authoritative index will be searched for a default Map member, either "congenital" or "acquired".  When a default is provided, this context will be employed to create one appropriate Map member and mapCategoryId will be (), mapRule=NULL, mapAdvice = "MAPPED FOLLOWING WHO GUIDANCE".