[re] OHP header
From: Sigi REICH (sr_at_ecs.soton.ac.uk)
Date: Mon 09 Jun 1997 - 15:57:18 CDT
Pete,
let me add some things in order to explain our decisions / questions:
- when working on OHP we assumed the basic components linkservice (LS),
session manager(SessionMgr), application (app), and document management
_(fwd link)_system (DM; I'll send a .gif picture to you in a separate mail; Note, we do
not claim that this is a reference architecture. It simply helped us during
our discussion on OHP). In order to have these basic components talking to
each other there should rather be a series of OHPs than one single
protocol: especially a DMP (Document Management Protocol) would often be
_(fwd link)_needed. (I think I do not really understand your point of 'ignoring' the SM
on 'a logical addressing level').
>In any event, suppose you had the following scenario. An app
>communicates to a link service through a session manager. Ignoring
>for a moment the collaboration problems with this (don't hit me,
>Jörg!), can the session manager be abstracted out of this discussion?
>It seems to me that the link service can logically address (in the
>header) it's messages to the app but physically route them to the
>session manager.
- when drawing the picture we realised that for some components protocol
information is opaque for others not; e.g., the location specifications
might be opaque for the linkservice but not for the application. That's why
I added the '??' to the line from SessionMgr to app. The question marks
should 'question' whether this part is still OHP or whether it is a
different level, or ...
- concerning collaboration we were thinking of adding a userID to each
message. Q: should this be part of the session header?
> 1) Do we want to handle collaboration in version 1?
>
> 2) If so, what to we need to add to the header?
>
Sigi
Sigi REICH, Visiting Research Fellow
Multimedia Research Group
Department of Electronics and Computer Science
The University of Southampton
Southampton S017 1BJ, U.K.
Tel: +44-1703 59 5415
Fax: +44-1703 59 2865
Email: sr_at_ecs.soton.ac.uk
WWW: http://www.ecs.soton.ac.uk
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: Tue 13 Aug 2002 - 07:34:00 CDT