What you own and what proves it, kept somewhere that outlives the house it is a record of.
Hosted is the entire point. A home inventory kept on a laptop in the kitchen burns with the kitchen, and the one moment you need it is the one moment it is gone.
Not written yet. It exists as a row in this application and as the description above, and nothing more. It is listed so the shape of the whole line is visible rather than hinted at.