The Hierarchy Service provides an efficient method of creating one or more logical navigation trees for the
Niagara system. You manage (set up and edit) hierarchy definitions on a station under the HierarchyService. Hierarchy definitions are not legal anywhere else in the station. To set up new hierarchy definition, drag and drop the
Hierarchy component onto the HierarchyService node or property sheet. Currently, the Hierarchy Service can contain an unlimited number of hierarchy definitions.
When you save a hierarchy definition, it executes against the system and the resulting Nav tree hierarchy is saved in the
station’s Hierarchy space. The navigation hierarchy name matches that of the hierarchy definition. In order to modify a navigation hierarchy,
you must make necessary changes in the hierarchy definition and save. Then simply right-click the Hierarchy node and refresh the nav tree to update the navigation hierarchy.