You use the VAX Common Data Dictionary Data Definition Language Utility
  (CDDL) to compile source files and place record definitions in a DMU
  dictionary.

  CDDL command qualifiers allow you to create default access control
  lists, to record the creation of record definitions in history list
  entries, to list source text and diagnostic messages in a listing file,
  to specify a default directory in which to store new record
  definitions, to replace an existing DMU record definition, and to
  create a new version of a DMU record definition.

     Command Syntax:

      CDDL [qualifiers] file-specification