Syntax:

             /[NO]COPY_LIST

  Use /COPY_LIST with /LISTING to expand in the listing file all template
  records included in a record description.  CDDL extracts all template
  records and inserts the corresponding CDDL source in the output listing
  file.  In the listing, CDDL inserts a "T" in the first character of
  each line that is part of an expanded template record.  You cannot
  specify /NOLISTING and /COPY_LIST.

  /NOCOPY_LIST is the default.