usefor-article-03 February 2000

4.2.2.2.  Inheritable Headers

   Subject only to the overriding ability of the poster to determine the
   contents of the headers in a proto-article, headers with the
   inheritable property MUST be copied by followup agents (perhaps with
   some modification) into the followup article, and headers without
   that property MUST NOT be so copied.  Examples include:
     o Newsgroups (5.5) - copied from the precursor, subject to any
       Followup-To header.
     o Subject (5.4) - modified by prefixing with "Re: ", but otherwise
       copied from the precursor.
     o References (6.8) - copied from the precursor, with the addition
       of the precursor's Message-ID.
     o Distribution (6.6) - copied from the precursor.

        NOTE: The Keywords header is not inheritable, though some older
        newsreaders treated it as such.