Oracle Fusion trees are graphical representations of hierarchical data such as the structure of your organization. Oracle Fusion Human Capital Management (HCM) provides predefined tree structures for department, organization, position, and geography trees. You cannot change the predefined HCM tree structures. With the exception of geography trees, you can create multiple trees for each HCM tree type, and multiple versions of each tree. For all HCM tree types, however, only one version of each tree can be active at one time.