Hierarchy Diagram Extensions

Hierarchies can be defined for Hierarchy Diagrams (HIDs). These hierarchies are a tree of:

• Item types
• The link types that connect them

You can use this mechanism to define a hierarchy of item types to be shown in the HID.

The topmost entry in the hierarchy represents the From item and cannot be edited or deleted. All other entries represent links to follow in the hierarchy and contain:

• An item type, which may be All item types
• Item ownership selection
• Link type, to specify that only cross references of a particular link type (or in a specific link group) should be followed
• Which direction to follow cross references

By providing complete control over the items and links to be shown at each level in the hierarchy, this facility allows precise control over the complexity of items and relationships that is shown in any HID: