Hi Joe,
Thanks for your interest in CaseComplete. We made a conscious decision not to support extends and generalization. Matt's reply in this thread gives some of the reasons behind this decision:
https://casecomplete.zendesk.com/hc/communities/public/questions/200382227-How-to-use-the-extend-relationship-in-CaseComplete-?locale=en-us
That said, you could document the relationship in diagrams (by manually drawing the relationship), and/or by use of custom fields. I already mentioned most of this to you in a separate communication, but I'll repeat it here for the benefit of the community, and expand upon it a little too:
Another approach would be to use custom fields. Using generalization as an example, you could create a custom field for actors named Inherits From and enter the base actor in the custom field, either by name or ID. This will create a reference which will show in the traceability tab of both the referenced and referencing actors. You could also customize your Word report template to show the referenced actors in the custom field. For example:
$repeatActorsSortID
$ID $Name
Base actor:
$listReferencedActors where RefLocation = InheritsFrom $ID $Name
$endrepeatActors
More about reporting references in a custom report here:
http://crug.casecomplete.com/#Advanced-ItemRefs-Filtering
Hope this helps,
Doug