The Link History (LNKHIST) inquiry page stores all old links, deleted ones and the pre-modified state of updated ones. The inquiry is used to explain why linked revenue amounts have changed at certain times due to reasons other than accounts receivable activity. For example, an expense budget has a negative un-obligated amount. This page would show that a link was deleted for that expense budget, explaining why that budget had the money to spend at one time. In addition, this page records all modified and deleted links with a date and time stamp of when the link was modified/deleted, as well as the Transaction Code, Department, ID, and Version that performed that modify/delete action.