[xwiki-users] Periods in space names fully legal?

It seems to work, e.g. a space name such as R12.01 Wiki links with such a space name prefix also seem to work, such as Home>>R12.01.WebHome even though it seems to me that creates a certain ambiguity about interpreting the period - which one is separating the space name from the page name at syntax rules level? Any other problems you can foresee? Are we going to get ourselves into trouble doing this? Really would prefer to use periods, but if not, what symbol is safe, such as a hyphen? Thanks MT