Databases are updated regularly, usually according to a fixed schedule, such as daily, weekly or monthly. Some databases are updated annually, or whenever there is a new version produced. Update frequencies are sometimes different from when articles appear in print versus online. A database noted as having an Update Frequency of “Archive” contains backfiles covering a specific time period. Current upates are added to a different file segment. For example, Dialog NewsRoom (NE04) is listed as “Archive” with data from 2004. Other databases are listed as “Closed” in that they contain a finite time period and are no longer updating
