


The date timestamp allows Liqu ib ase to determine which changes ets have already been applied and which still need to be applied.

xml file is used by Liqu ib ase to track the changes ets that have already been applied to the database. Notice the timestamps in changelogs' references. Here is an example of the master.xml, which also contains the above changelog file: Note how the change set is identified by an id and an author to make sure it can be uniquely identified and only applied once.
