Understanding vault history 

Besides being able to manage released documents and the changes being made to them, Meridian is able to retain all previous revisions of documents that are changed within a vault. This makes the revisions available to users for reference or to revert back to if a released document is unsuitable. Users may also open a vault at a specific moment in the past and view the vault’s contents as it existed at that time.

Revision history can be enabled or cleared for the whole vault and is set when the vault is created. It cannot be reconfigured later, although documents in history can be periodically archived or removed as described in the BlueCielo Meridian Enterprise Administrator’s Guide.