- more unit tests, especially for unit and quantity package
- add all quantities for which SI units exists
- tests for root units, e.g. 1 s^1/2 ~= 31.623ms1/2)
- add all SI units
- unit & quantity formatter / parser
- add more convenience methods for known quantity transformations: length * length = area, ...
- add more units from other systems
- Quantity interface should have methods to modify quantities with scalar values e.g. add(double value), multiply(double value), this would simplify some use-cases, e.g. get double the length of something