The DICTIONARY command is used to invoke the Oracle CDD/Repository
  utilities.

  Command Syntax:

  DICTIONARY [option]

  Where option specifies the utility to invoke.  If no option is
  specified, OPERATOR is the default.

  See also REPOSITORY OPERATOR; the DICTIONARY OPERATOR and the
  REPOSITORY OPERATOR commands perform the same function.  Each command
  can be used to invoke the CDO utility.