The current fraction style is unclear in how fractions are to be represented, as far as numbers exceeeding 1 are concerned: Assuming a denominator value of 7 and all minimum digit attributes set to 0, pi could be represented as 3 1/7 or as 22/7. There seem to be no indication of which representation should be used, and so either representation would be acceptable.

In fact we should surely add an attribute that indicates whether the integer portion is shown separately or as part of the fraction.