I've been working on a library for parsing geolite's GeoIP csv file (http://hackage.haskell.org/package/geolite-csv-0.2/docs/Geolite-Types.html). In this file, the latitude and longitude are always given to four decimal points of precision. It seems like the Fixed data type (from Data.Fixed in base) is the best choice for representing this. However, the precision levels provided are: - E0 - E1 - E2 - E3 - E6 - E9 - E12 I would like to propose adding all of the missing ones into Data.Fixed as well. Even though needed a four-decimal-point-precision number is uncommon, it's not unheard of. Admittedly, the precision offered by E11 seems unlikely to ever be needed, but I think it would be nice for completeness. I would be happy to PR this if others agree that it's a good idea. -Andrew Martin