In Compendium-TA graphs and entities are more than data.

I can, and did, use outliners to structure my thoughts, but with a normal outliner I could only manage one outline at a time. I want to be able to manage multiple outlines or hierarchies and have the same piece of information in them all if I want to..

I want hierarchies to represent my source documents and to put in the test conditions I derive from the sections of the document.

I want the same test condition in a classification hierarchy to let me think about the effect in system testing, and in another hierarchy for UAT.