[mkgmap-dev] Lower-cased Roman numbers in street names

Hi, I noted that street names change from e.g. "Rua Dom Pedro II" (OSM) to "Rua Dom Pedro Ii" (BaseCamp, Garmin unit), from "Rua João XXIII" to "Rua João Xxiii", etc. Does mkgmap apply some text processing rules that cause these changes? Hermann