2010/9/15 "Martin J. Dürst" <duerst at it.aoyama.ac.jp>: > I think there is always the possibility of defining a variant with > syntactically two subtags, i.e. iso9-1995, iso9-1968, ... Can this be done without preventing 1995 or 1968 from being used as variant subtags in their own right in the future? Avram