RE: [VPIM] Analogy to Content-Duration for Faxes


Neystadt, John (John_Neystadt@icomverse.com)
Tue, 8 Feb 2000 12:06:11 +0200


If I undestand correctly the Content-Duration header is applied not to
primary MIME header, but to MIME envelopes of individual body parts. Thus if
you have few TIFs or few voice attchements (or mix of each) you can indicate
length for each of them.

As to overloading the subject, this can be done only because of lack of
standard. I the conventional way should be MIME header so that software from
different vendors could interoperate.

I think Content-Length is bad header to put number of pages, since it used
in HTTP to indicate the octet-length of the body part. This would create
overloading.

So I propose - either to use same Content-Duration (this may be misleading
sematically) or to invent another header, like 'Content-Pages:'.

John Neystadt
john@neystadt.org
http://www.neystadt.org/john/

-----Original Message-----
From: Tony Kueh [mailto:akueh@Exchange.MICROSOFT.com]
Sent: Tue, February 08, 2000 3:40 AM
To: 'Glenn Parsons'; IETF VPIM List
Cc: ietf-fax@imc.org
Subject: RE: [VPIM] Analogy to Content-Duration for Faxes

message. How would one calculate the total length in the subject field? If
it was really part of the subject, then changing the content of a message
(ie. forward a fax) would require the update of the subject field.
 
Sounds like a lot of work.
 
Why not just keep the Content-Length header on the body part and have the
clients that wish to render a total length to dynamicallly pre-pend it or
set it on the rendered subject field on the fly?
 
-----Original Message-----
From: Glenn Parsons [mailto:gparsons@nortelnetworks.com]
Sent: Monday, February 07, 2000 8:07 AM
To: IETF VPIM List
Cc: ietf-fax@imc.org
Subject: RE: [VPIM] Analogy to Content-Duration for Faxes

At one point we had proposed a 'Content-Length' header specifically for fax
page count. I cannot remember if it was ever included in an RFC or not.
In practice, we have found it more practical to put thie information in the
Subject field. Then the user will see the info in their GUI.
Cheers,
Glenn.
----------
From: Murray, Doug
Sent: Thursday, February 3, 2000 6:11 pm
To: 'Neystadt, John'; vpim@lists.neystadt.org
Subject: RE: [VPIM] Analogy to Content-Duration for Faxes
Yes, it is very useful to have content duration in meaningful units such as
seconds of audio (or video), pages of fax, etc. Most e-mail clients will not

display this information, however.
The place that this information is most useful is within a TUI where it is
useful to announce the number of pages in a fax, Word document or whatever
so the recipient can decide whether to forward the document to a fax
machine.
-----Original Message-----
From: Neystadt, John [mailto:John_Neystadt@icomverse.com]
Sent: Thursday, January 27, 2000 3:27 AM
To: vpim@lists.neystadt.org
Subject: [VPIM] Analogy to Content-Duration for Faxes

Hi!
I wonder if anybody came to need of Analogy to Content-Duration for Faxes to

indicate the number of pages. This is handy to present GUI idication of fax
size in pages (as in seconds for voice) instead of KBs.
Does somebody needs this in addition to us?
Regards,
John Neystadt



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