Re: [ebxml-cppa-negot] CPA negotiation,contact with negotiation research community plus some thoughts.

["Monica J. Martin" <Monica.Martin@Sun.COM>]

>Schlegel: If the Automated Negotiation of CPA specification does not deal with the
>actual negotiation, then I think the negotiation protocol (bpss), the
>negotiation messages, and some negotiation rules, are already pretty
>good. The problem I think is the high number of possiblites of what can
>be negotiated, there are so many possiblities, that its difficult to
>imagine.
>
>So, if we want to continue the negotiation path, I think we need to talk
>about the NDD more, specially about those types of the negotiable
>information items. In my research I did not realy use an NDD but sort of
>a restricted NDD, where users only could negotiate over values of
>elements and attributes of the CPA template, not about ranges or
>cardinality problems, or values with piecewise functions.
>
>Also, I wonder how much negoitation information is necessary in an NDD.
>Beacuse, in the end, the negotiation will be run in a negotiation
>application (or software agent). So for example, a piecewise function
>might expose already too much information. A simple reference to the
>negotiable element or attribute might be sufficient. The only reason for
>more information in the NDD was (as far as I remember), to potentially
>converge to a solution faster. On the other hand, the CPA composition
>process can use some more information, again on the cost of revealing
>those information.
>
>Please let me know what you think.
>  
>
mm1: Sacha, prior to this time we discuss how CPPA could effectively 
work / interoperate with XACML and WSPL. Could not the cardinality, 
value, range resolution occur using WSPL as another complementary 
service? Perhaps this is outside of the scope of your question but the 
functionality may already exist to do so.

On the negotiability of the business transactional aspects (or for other 
business transaction characteristics in other specifications for that 
matter), could be many and complex. I would suggest two possible options 
to consider: Look at the automated process matching proposed by 
OpenXchange, partially resolved using WSPL or left outside of the CPPA 
negotiation. I am not advocating any approach but all present some 
opportunity and challenges. Thanks.