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Subject: interaction question [was: DM2 + SoaML]

This is an exchange with Cory Casanave that is part of the DM2 and SoaML work.  Start from the bottom, as usual, and then consider the following.

Do we need to say more about service interactions where the real world effects can occur long after the passing of messages has completed?  I'm not an expert in the definition of transactions but I don't think of the example I give below (requesting a copy of an explanation of benefits and later paying a fee) as just one "classic" transaction.  If I don't pay the bill and it goes to collection and I dispute it on constitutional terms that get appealed to the Supreme Court, is that one transaction?  Assuming SOA services, when do interactions begin and end?


Begin forwarded message:

From: Cory Casanave <cory-c@modeldriven.com>
Date: November 21, 2009 11:43:57 PM EST
To: Cory Casanave <cory-c@modeldriven.com>, "Laskey, Ken" <klaskey@mitre.org>
Cc: "Dandashi, Fatma" <dandashi@mitre.org>, "Bock, Conrad" <conrad.bock@nist.gov>, Dave McDaniel <davem@silverbulletinc.com>
Subject: RE: DM2 + SoaML

Also, I think it should also be said that SoaML services may be long
lived (months or years), complex and multi directional.  I would expect
the final "months later" action or payment that was the satisfaction of
the service obligation to also be part of the service contract and real
world effects.
I think this would be the same in the Oasis RM.  True?

-----Original Message-----
From: Cory Casanave
Sent: Saturday, November 21, 2009 11:35 PM
To: 'Ken Laskey'
Cc: Dandashi, Fatma; Bock, Conrad; Dave McDaniel
Subject: RE: DM2 + SoaML

Yes it does, or at least could - if modeled that way.  The value
exchanged is then an obligation for the future action.

-----Original Message-----
From: Ken Laskey [mailto:klaskey@mitre.org]
Sent: Saturday, November 21, 2009 5:42 PM
To: Cory Casanave
Cc: Dandashi, Fatma; Bock, Conrad; Dave McDaniel
Subject: Re: DM2 + SoaML

Note, with respect to real world effect, these are (OASIS definition)  
the observable changes in the world that result from the interaction.   
The participants may find value in the real world effects -- it is  
likely if they were willing to engage in the interaction and the real  
world effects were sufficiently described so there weren't surprises.   
However, this is only "value exchanged between participants when a  
service is enacted" if you consider this value exchange to include all  
real world effects that may occur out of band later.  For example, I  
may request an explanation of benefits that will not be processed for  
several days.  After the request is processed, I will be billed a  
service charge and I will be expected to pay that service charge  
within some elapsed time.  The interaction set a process in motion   
that provides the explanation of benefits and a service payment but  
there are things that will occur after the interaction itself is long  

So, does the idea of value exchange cover from when the interaction is  
initiated to when all actions deriving from that interaction are  
complete, even if this is months later?


On Nov 21, 2009, at 3:12 PM, Cory Casanave wrote:

Also, on the definitional fragments in your document:
- This word sense would be better: 1 : to work jointly with others or
together especially in an intellectual endeavor
- A collaboration in UML and SoaML specifies how participants will  
together for a purpose.

Real world effect - the real world effect in SoaML is the value
exchanged between participants when a service is enacted.

Port - the word sense is clearly not the one intended.  A port is an
interaction point.

However, I don't think the definition fragments or Webster's will  
get us
very far, we should be using the full definitions of the model  
from the specification and the examples which illustrate these.


Ken Laskey
MITRE Corporation, M/S H305      phone: 703-983-7934
7515 Colshire Drive                         fax:       703-983-1379
McLean VA 22102-7508

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