II.3.5 Management of Units

The “ClaMat” class defines three methods for the management of units:

• “getUnits” returns a Hash containing the definition of units associated to the material.
• “setUnits” has a Hash argument and sets the units associated to the material.
• “changeUnits” has a Hash argument and changes the units associated to the material.

The Hash arguments or return values mentioned above have String keys and values as explained in section II.1.13. The difference between the “setUnits” and “changeUnits” methods is also explained in the same section.