Introduction › Concepts and Facilities › MODS Administration Facilities › MODS Control File Maintenance › Automatic Promotion

Automatic Promotion

Only the topmost file in the path is modifiable by means of any of the maintenance facilities. A request to update any definition not resident in the top file retrieves the definition from the lower file and stores it into the topmost file (this is known as automatic promotion). New records are always added to the topmost file in the path.