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Subject: Re: Message Type Description

Thanks for posting this document. It helps clarify a number of issues. I 
think we may want to take this off-line in the interest of reducing 
Signal/Noise but for now let me make a couple of comments. Keep in mind 
these comments are in the context of the demo.

  - I think the headers reflect a blurring between Transport layer, Message 
layer, and Application layer. There may be a good reason for this and I'm 
still at the point of convincing myself of it's merit. I am not there yet 
but I'm keeping an open mind. I am coming from a world of strict layering 
i.e. the transport should only see what it has to in order to do its;' job. 
Then it's clear what value ebXML Transport actually provides. My assumption 
is that if it isn't making the life of an application developer easier then 
why bother.

  -  The document shows the transport consuming messages only from the 
network and implies the transport state machine is driven by network events 
only. I may have this wrong, but is there some assumption that the 
Transport, Message and Application layers are in the same thread of 
execution ? My assumption is that the Transport Layer state machine is 
driven by events at the Application layer ( for now I am assuming the 
Message layer is a Transport sub-layer) as well as event from the Network 


At 11:34 AM 4/14/2000 +0100, john_ibbotson@uk.ibm.com wrote:

>Here is a copy of David's Message Type Description document as discussed in
>yesterdays conference call.
>(See attached file: ebXML Message Header Message Types v0-0.doc)
>MQSeries Technical Strategy & Planning,
>IBM UK Ltd, Hursley Park,
>Winchester, SO21 2JN
>Tel: +44 (0)1962 815188
>Fax: +44 (0)1962 816898
>Notes Id: John Ibbotson/UK/IBM
>email: john_ibbotson@uk.ibm.com

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