Re: Comments on primer please

Comments:

I think the same document should be suitable for business analysts (probably 
jusst the first few sections), choreography designers with the various 
advanced situations that should be covered, but should also be suitable for 
CDL implementors - i.e. providing clarifications on how advanced situations 
should be handled, including how to potentially bind with other standards 
(e.g. security, reliable messaging, coordination, etc.).

Section 3: Although I think the initial focus on interactions is a good 
idea, as essentially CDL is promoting an 'interaction oriented' approach to 
designing distributed systems, I am not sure that the interaction syntax 
details (and code fragments) are appropriate here. I think section 3 should 
be focusing on describing the example, highlighting the interaction focus, 
but then establish the static type information required to support the 
interaction-oriented description - including participants which is currently 
missing. This then sets the scene for the flow description of the 
activities.

Possibly section 4 can be describing the interaction (with the details about 
exchanges and record details).

Then maybe section 5 on structural activities.

Section 6 on more advanced choreo patterns
 - modularization (performing sub-choreos)
 - including async concurrent performs
 - dependent workunits

Section 7 could then focus on Faults, Exception Handling and Finalization 
(talk about finalization as opposed to compensation, as compensation is only 
one possible use of the finalizer mechanism). Also could deal with timeouts?

Section 8 on "gotchas" - such as race conditions and the consequences of 
global conditions that do not have the appropriate state management to 
ensure that each participant have the appropriate state to support the 
conditions. Also possibly discuss interference scenarios in terms of 
linearity?

Section 9 - WS-CDL with other standards - show examples of how CDL can be 
bound to security, reliable message and coordination standards

Regards
Gary






----- Original Message ----- 
From: "Steve Ross-Talbot" <steve@pi4tech.com>
To: "'WS-Choreography List'" <public-ws-chor@w3.org>
Sent: Monday, July 04, 2005 11:52 AM
Subject: Comments on primer please


>
> All:
>
> I'd like to get some direction comments and even contributions to the 
> primer.
>
> Can you take a look between now and tomorrow's meeting so that we can be 
> focussed.
>
> One thing to think about is who are the readers (the roles they play) and 
> what we want them to get out of the primer.
>
> Cheers
>
> Steve T
>
>
>
>
>

Received on Tuesday, 5 July 2005 14:01:21 UTC