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<p class=MsoPlainText><span lang=EN-US>Dear GRAAP – Working Group,<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> my name is Sebastian Hudert and I
am affiliated with the Department of<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Information Systems Management at
the University of Bayreuth. I have<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> been working on a negotiation
framework for WS-Agreement together with<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Dr. Heiko Ludwig (IBM Research)
and Prof. Guido Wirtz (University of<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Bamberg). After meeting Wolfgang
Ziegler at the CoreGRID Integration<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Workshop he suggested to introduce
our ideas to the GRAAP – WG in order<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> to contribute to the
WSAgreementNegotiation standard.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Our main idea was to create a
framework with which not only one<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> particular negotiation protocol
(e. g. an English Auction) can be<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> executed, but one that allows for
a variety of different negotiation<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> protocols to be used according to
the particular situation the system is<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> in. We proposed an XML-based
language that can be used to define a<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> negotiation protocol in a
machine-processable manner. A protocol<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> description, coded as an XML
document, therefore represents all the<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> input needed by a service
requestor or provider in order to take part in<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> the particular negotiation
process.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Using the derived data structure
we propose a two-staged negotiation<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> process:<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> 1.
Exchange process: During this phase a negotiation protocol<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> description document is created
(possibly based on pre-defined protocol<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> types and referring to a given
WS-Agreement Template) and distributed to<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> the future negotiators within the
system. This process is implemented as<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> a set of simple interfaces and
valid method invocation sequences in<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> analogy to the WS-Agreement
standard itself.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> 2.
Negotiation process: After supplying all negotiators with the<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> protocol description these nodes
engage in the actual negotiation<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> process. We propose a set of
generic interfaces able to cope with all<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> negotiation protocols that can be
described with the description<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> language we defined.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> This way the logical steps from an
initial need for a resource or the<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> will to sell one to reaching a
valid WS-Agreement are:<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Protocol Definition (XML-based
Documents) </span><span lang=EN-US style='font-family:Wingdings'>à</span><span
lang=EN-US> Exchange of protocol<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> description to future negotiators
(Exchange process) </span><span lang=EN-US style='font-family:Wingdings'>à</span><span
lang=EN-US> Negotiation<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> (Negotiation process) </span><span
lang=EN-US style='font-family:Wingdings'>à</span><span lang=EN-US> Agreement
formation<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> I included a Paper presented at
KIVS ’07 on this topic. We hope that you find our ideas an<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> interesting input for the ongoing
standardization effort. I will attend<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> the OGF 23 in Barcelona which
would also be a possibility for me to<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> present our work in the working
group session, if there is interest among the WG.<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Best Regards,<o:p></o:p></span></p>
<p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoPlainText><span lang=EN-US> Sebastian Hudert<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal>---------------------------------------------------------------------------<o:p></o:p></p>
<p class=MsoNormal>Sebastian Hudert<o:p></o:p></p>
<p class=MsoNormal>Dipl. Wirtsch.Inf.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>Department of Information Systems
Management<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>University of Bayreuth<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Universitaetsstr. 30<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>95447 Bayreuth<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Building Applied Informatics<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Tel: +49 921 557665<o:p></o:p></span></p>
<p class=MsoNormal>Fax: +49 921 557662<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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