You will now turn the disjoint decompositon that you just created into a partition.
Select the disjoint decomposition under Weapon-of-Mass-Destruction by clicking on the green bar.
You can use a single command to upgrade the disjoint decomposition to a partition. Select "Upgrade decomposition to partition" from the "Decomposition" menu.
Notice that the green bar next to the classes has become a red bar. A red bar signifies that the subclasses of a class form a partition.
For future reference, a blue bar next to the subclasses of a class signifies that the subclasses form an exhaustive decomposition of the class.
In the next section, you will learn how to use Chimaera to merge slots.