The DEFINE RMS_DATABASE command creates a logical RMS database
    element in a CDO repository.

    A logical RMS database consists of only one record and file
    definition. However, one logical RMS database definition can
    be owned by many physical RMS databases, where each physical RMS
    database owns a different CDD$FILE element. To create a physical
    RMS database on a disk with the characteristics specified by the
    DEFINE RMS_DATABASE command, issue the DEFINE DATABASE command.

    To create a valid logical RMS database element, you must specify
    at least one record element and a file definition property with a
    SEQUENTIAL file organization option.