Dale A. Callaham wrote:
 
>I have documentation for the TIFF format that was current in 1987. I'm
>sure that the specification has been extended by now. Can you please tell
>me what documentation you refer to in the above message so I can have a
>look at it? In advance, Thanks.
 
I can't currently locate the Internet source for this. It is a large
document (121 pages for the Revision 6 Final dated 1992) which is
distributed in Postscript format, which makes it easy enough to print
out.
 
"For copy of the TIFF specification call (206) 628-6593"
        Maybe someone in the US can do this - it's expensive
from here.
 
Non-Internet sources:
"On compuserve: GO ALDSVC, Message section #10"
"Applelink: Aldus Developers Icon"
 
The quotes are from the title page.  There is an Internet ftp site (maybe
more than one) and I'll post it when I find it (unless someone else
does so first).
 
The section relating to multiple images is changed relative to
previous releases - see p36 "NewSubfileType".  Tage 254.
 
The options specifically considered here are reduced resolution version
of another image, multi-page image (which would be what you would use,
but which a cross-reference indicates was originally conceived for a
multi-page fax) or transparency mask.  These options are indicated by
bit flags.
 
                Guy Cox