[Nmc-wg] Transport protocol
zurawski at internet2.edu
Tue Feb 16 08:14:49 CST 2010
>> In practice, only XML in SOAP over HTTP seems to be used. To we want to
>> impose that? I think it should be, though I am fine if it is either in
>> the NMC base document or in another document (which has the advantage
>> that if we later want to change the transport protocol, it is not
>> necessary to update the base document).
> I think that's already "imposed" and so we should document it as
> such. I think you raise a good point, in that it shouldn't need to
> be a requirement forever. If we are careful (and maybe not even
> too careful) we could have the WS encoding be any of the standard
> varieties. So I, for one, would vote for also saying that -- "it is XML/
> SOAP/HTTP now, but needn't be forever."
When I started the documentation it was my intention to avoid specifics
of the WS (e.g. 'XML in SOAP over HTTP') because I think it is important
that we don't inject implementation details into the description of the
protocol bindings. This would strike me as making a heavy handed
mandate on implementation styles and choices, particularly when I would
envision future versions of NMC-capable frameworks trying different
things as technologies mature or improve.
Including this as 'we do this now, but we don't have to' still doesn't
sound 100% correct me if we are going forward with the idea to document
the "current" way of doing things with minor corrections, but I suppose
I could be convinced. I would rather us not mandate the WS medium at
all because it doesn't strike me as important to the overall
>> Beside describing the transport protocol, which document is to defined
>> the preferred TCP server ports for a given service? I presume the
>> documents describing the individual services should define the later.
> There are conventions, but as the are registered in the information
> service, they can change. The conventions could be added as
> informative text, as you suggest.
As Martin (and Aaron) pointed out - this is an implementation detail. I
want to avoid this at all costs.
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