You can create document relationships by either "Link" field (by having compounds) or "Docbase" field (by having UUID string property) in document type editor.
Even if a "Docbase" field is set to be "multiple" and "ordered", it doesn't provide the equivalent user experience to change orders and delete items like "Link" field does.
See the following screenshots for your information:
"Llink" field shows "up" and "down" arrows to change orders on mouse-hovering and "delete (X)" item button as well.
However, "Docbase" field doesn't show those on mouse-hovering. You have to select each again and again to change the orders, which is really inconvenient.
It would be nice if the "Docbase" field works like "Link" field for ordering and deleting on mouse-hovering.