In systems engineering, trees are commonly used to display a hierarchical structure. Elements in hierarchical structures can be viewed in regular tables but their hierarchy is more recognizable in a tree structure. Therefore, Relatics offers a specific tree view to view and edit hierarchical elements. This view enables users to benefit from a hierarchical visualization and additional editing capabilities.

Use the tree view for hierarchical elements

The following actions are available in the toolbox when an element is selected.

Icon	Toolbox action	Explanation
	Create root/sibling	A new element is created on the selected level of the tree.
	Create child	A derived element is created.
	Move up	The element’s position is moved up. This button is only available when positioning is activated.
	Move down	The element’s position is moved down. This button is only available when positioning is activated.
	Copy	Used to copy the selected element(s).
	Paste	Used to paste element(s).
	Delete	Used to remove the selected element(s).

The following actions are available in the toolbox when a property of an element is selected.

Icon	Toolbox action	Explanation
	Edit	Used to rename an element.

Note:

• For each element in the treeview, the value of one of its properties is shown. Typically, this is a descriptive property (e.g. a property ‘Name’). The property used to display the value in the treeview is set as the Display as property for the element.

Restructure the hierarchy of elements in a tree view

1. In the overview, click on Treeview.
2. In the tree view, select an element and drag and drop it on another element in the tree. The element on which you drop is marked byAs a result, the dragged element is now derived from the element on which it is dropped.
3. In the tree view, select an element and drag and drop it above or below another element on the same level in the tree. As a result, the dragged element’s position is now relative to other elements on the same level.

Gain insight into elements in a tree view

The following actions are available in the ribbon of the tree view.

Icon	Feature	Explanation
	Expand all	Quickly expand all root elements and their children.
	Collapse all	Quickly collapse all root elements and their children.
	Back in time	View the tree at a state in the past.

Enable feature^*

1. In the workspace menu, click on  Type graphview.
2. In the model, click on the type element.
3. In the toolbox, click on Edit. As a result, the dialog Type element settings is opened.
4. In the dialog Type element settings, on the tab Advanced, ensure that Configuration is set to Derived element and that the Origin relation is set to a single relation that is part of the hierarchical structure.
5. In the dialog Type element settings, on the tab Advanced, tick the checkbox for Hierarchical behavior.

Note:

• If the origin relation refers to the same type element, the option Hierarchical behavior is automatically enabled and cannot be disabled. This model pattern is always considered to be a hierarchical structure, and therefore always, a tree view is available.

* In the workspace, the user type of your user must be set to power user to enable this feature.