BUG ":" should filter categories for ambiguous dimensions, just like Find Units

[rtestardi]

rpm:Angular_velocity?

rpm_as_angular_velocity ? [Frequency]= 0.10472 hertz
rpm_as_angular_velocity ? [Angular_velocity]= 0.10472 radian/second
rpm_as_frequency ? [Frequency]= 0.0166667 hertz
rpm_as_frequency ? [Angular_velocity]= 0.0166667 radian/second