Hello,
Consider this example Java code:
   Unit metersPerSecondUnit = format.parse("m/s");
   Unit unit1 = format.parse("60 m / minute");
   Unit unit2 = format.parse("600 m / 10 minutes");
   System.out.println(unit1.getCanonicalString());  // Prints "1.0 m.s-1"
   System.out.println(unit2.getCanonicalString());  // Prints "3600.0 m.s"
   System.out.println(metersPerSecondUnit.isCompatible(unit1));  // 
Prints "true"
   System.out.println(metersPerSecondUnit.isCompatible(unit2));  // 
Prints "false"
   System.out.println(unit1.equals(unit2));  // Prints "false"
Pretty strange results, huh? Is the parse method intended to support a 
unit spec such as "600 m / 10 minutes"? It certainly didn't throw an 
exception when I tried.