[Pgi-wg] PGI Execution Service teleconference today Wednesday 06 May 2009 at 16h CEST

[Etienne URBAH]

Moreno and All,

Concerning the next PGI Execution Service teleconference held today, 
Wednesday 06 May 2009 at 16h CEST :


New title of the GES document
-----------------------------
I propose 'PGI Execution Service'.


States and Transitions Model
----------------------------
A software service can easily publish the list of its states and the 
authorized transitions between states.  A software client can easily 
read them.

But beyond the syntax, the transitions contain SEMANTICS :
-  Human software engineers can describe (with some work and review) 
these semantics for understanding by human software engineers,
-  But I am afraid that it is very difficult to describe these semantics 
for understanding by a computer software.  Therefore, I am afraid that a 
software client can NOT guess how to adequately USE the listed 
authorized transitions.

So, I advise that we agree on the largest possible list of states and 
transitions, with the semantics of their transitions.
-  That will define PGI-compliance.
-  Any further refinement of states will be accepted ONLY for logging 
purposes, but any further transition will be completely optional and NOT 
supported by PGI.

Please study this issue, make your own mind, and express your position.


Best regards.

-----------------------------------------------------
Etienne URBAH         LAL, Univ Paris-Sud, IN2P3/CNRS
                       Bat 200   91898 ORSAY    France
Tel: +33 1 64 46 84 87      Skype: etienne.urbah
Mob: +33 6 22 30 53 27      mailto:urbah at lal.in2p3.fr
-----------------------------------------------------


On Tue, 05 May 2009, Moreno Marzolla wrote:
> Dear all,
> 
> the next PGI teleconference will be held tomorrow, wednesday may 6th
> at 16:00 CET (duration: 1 hour).
> 
> Call-in details as follow:
> via Skype call +9900827049931906 (free of charge) ordinary phone numbers
> (local rates) with the 9931906 conference number:
> 
> Austria 0820 401 15470
> Belgium 0703 57 134
> France 0826 109 071
> Germany +49 (0) 180 500 9527
> Switzerland 0848 560 397
> 
> Agenda (please feel free to suggest additional items):
> 
> 1) Whether http://forge.ogf.org/sf/go/doc15615?nav=1 contains 
> information which should be included in the requirements documents, as 
> suggested by Etienne;
> 
> 2) Any final issues with the requirements document, especially with the 
> state model as discussed last time; hopefully this item will be 
> discussed very quickly;
> 
> 3) How the requirements can be mapped into an actual implementation
> 
> Moreno.
> 
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