Release notes for Oracle CDD/Repository are contained in the files:

      SYS$HELP:CDDnnn.RELEASE_NOTES
      SYS$HELP:CDDnnn_RELEASE_NOTES.PS

  Where nnn represents the Oracle CDD/Repository version number.  For
  example, to see the Version 7.2 release notes, type or print the
  CDD072.RELEASE_NOTES file to read the release note information.

  To find what release note files are available, use the following DCL
  command:

       $ DIRECTORY SYS$HELP:*.RELEASE_NOTES