usefor-article-03 February 2000

6.17.5.  Content Disposition

   Reading agents SHOULD honour any Content-Disposition header that is
   provided (in particular, they SHOULD display any part of a multipart
   for which the disposition is "inline", possibly distinguished from
   adjacent parts by some suitable separator). In the absence of such a
   header, the body of an article or any part of a multipart with
   Content-Type "text" SHOULD be displayed inline. Followup agents which
   quote parts of a precursor (see 4.3.2) SHOULD initially include all
   parts of the precursor that were displayed inline, as if they were a
   single part.