From: "der Mouse" <mouse at rodents.montreal.qc.ca>
As of 2005-01-30 I found
http://partners.adobe.com/public/developer/en/pdf/PDFReference16.pdf,
and it was there when I checked sometime later this year (I don't
have any record of that date).
I note it's a PDF file, which makes for an amusing checken-and-egg
problem in principle. :-)
Even in practice, since the darned thing appears to be in PDF 1.6 format
(which my Acrobat 4.0 doesn't seem able to read).
Vince