No, it is not. A ledger is a append-only data structure consisting of a list of (applied) transactions. What kind of transactions depends on what you're ledger-

No, it is not. A ledger is a append-only data structure consisting of a list of (applied) transactions. What kind of transactions depends on what you're ledger-ing, but it certainly doesn't imply relative values (if anything the opposite, though probably not anything).