The VAX Common Data Dictionary's Verify/Fix Utility  (CDDV)  scans  a
  physical   dictionary   file   for  inconsistencies  and  reorganizes
  dictionary files to enhance efficiency.  The operator can examine  or
  alter  dictionary  files  with  any  of  three  commands.  The VERIFY
  command merely generates an  error  report,  while  the  FIX  command
  generates  an  error report and repairs the dictionary.  The COMPRESS
  command reorganizes a dictionary file.