You can include four optional package information files in your package:
Defines previous versions of the package that are compatible with this version of your package.
Indicates other packages that have a special relationship with your package.
Defines disk space requirements for the target environment, beyond what is required by the objects defined in the prototype file. For example, additional space might be needed for files that are dynamically created at installation time.
Defines the text for a copyright message that displays at the time of package installation.
Each package information file should have an entry in the prototype file. See Creating Information Files for more information on creating these files.