Extension=Disable
    Extension=Enable

    Allows you to change the automatic file extension attribute
    when you restore a database. These qualifiers are positional
    qualifiers.

    Use the Extension=Disable qualifier to disable automatic file
    extension for a storage area.

    Use the Extension=Enable qualifier to enable automatic file
    extension for a storage area.

    If you do not specify the Extension=Disable or Extension=Enable
    qualifier, the storage areas are restored with the automatic file
    extension attributes that were in effect when the database was
    backed up.