Glenn Parsons (gparsons@nortelnetworks.com)
Fri, 10 Mar 2000 11:00:45 -0600
Now I remember :-)
It was one of the opitions described in <draft-ema-vpim-imap-01.txt> for
message length indicator. I have exerted the section below. The original
intent of this was for clients to get this information via IMAP and present
it on the client.
Despite the ugliness of subject overloading, I am afraid that is what a lot
of products implement. I guess the question is do we want to endorse this,
or create a better mechanism (like the Conneg suggestion or one of the
others below). If we choose the latter, the client vendors have to agree to
implement it, or the industry will likely tend to what they do now.
Glenn.
8. Message Length Indicator In the cases of large attachments, small clients and slow links there is also a need for the client to see the length of the message in a suitable format before opening it. A message length indicator suitable for voicemail and fax should indicate the length of the message using number of seconds for a voice message and using number of pages for a fax message. The client MUST support the chosen method. There are three suggested methods and among them, 8.3 is favoured: 8.1 MIME Header Content-Duration as described in RFC 2424 [7] For fax messages a new MIME Header, Content-Page-Length, would be defined, similar to Content-Duration with the exception that number of pages would be specified, rather than number of seconds. (e.g. Content-Page-Length:3). This would be created at originator. 8.2 FETCH item USERSIZE similar to FETCH items described in IMAP4rev1 [3]. This would be created at reception. 8.2.1 USERSI
ZE is a non-negative number. Its meaning depends on document type. C: abc FETCH 1:2 (USERSIZE) S: *1 FETCH (12) S: *2 FETCH (57) S: abc FETCH completed. 8.2.2 USERSIZE is a pair of number and unit. There is a small set of unit tokens. C: abc FETCH 1:2 (USERSIZE) S: *1 FETCH (12 pages) S: *2 FETCH (57 seconds) S: abc FETCH completed. 8.2.3 USERSIZE is a sequence of pairs, in case something extends in more than one unit. C: abc FETCH 1:2 (USERSIZE) S: *1 FETCH (12 lines) S: *1 FETCH (57 pages 6 hours) S: abc FETCH completed. Servers that support USERSIZE SHOULD list the USERSIZE capability in response to the CAPABILITY command. 8.3 Message length indicated as a parameter of an existing Header Field
[4]. This would be created at the source. This method would allow the
message length to be passed to the client by default. 8.3.1 Content-Type Header Field Content-Type=audio/*; length=50 Content-Type=image/tiff; pages=3 8.3.2 Subject Header Field Subject=Voice Message (0:04) Subject=Fax Message (3) The advantage of the subject field is that it is automatically
displayed to the user.
> ----------
> From: Parsons, Glenn [NORSE:6L45:EXCH]
> Sent: Friday, February 4, 2000 6:08 am
> To: vpim@lists.neystadt.org
> 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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