Subpages for the document editor

Hi there!

I would like to use the document editor.
But I need a structur with subpages like this:

Document 1
+ Subdocument 1.1
+ Subdocument 1.2

Document 2
....


And I would be able to link a document to another object (for example a rdp session).
use case: I see the rdp session for a server and I can see a document as a sub entry of this element.