Terrence -
I have multiple description key sets not for various standards, but to organize them in groups. Their is a sort order of which key set get evaluated before then next. I don't think you can "disable" the City set from the Village set, esp, if a V in one set requires one symbol for the City and a different symbol for the Village. I think seperate templates would be needed.
Matt Anderson
Matthew Anderson, PE CFM
Product Manager
Autodesk (Innovyze)