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A proposal for WS-agreement negotiation

: Battré, D.; Brazier, F.M.; Clark, K.P.; Oey, M.; Papaspyrou, A.; Wäldrich, O.; Wieder, P.; Ziegler, W.


Association for Computing Machinery -ACM-; Institute of Electrical and Electronics Engineers -IEEE-:
11th IEEE/ACM International Conference on Grid Computing 2010. Proceedings : 25-29 October 2010 in Brussels, Belgium
New York, NY: IEEE, 2010
ISBN: 978-1-4244-9348-7
International Conference on Grid Computing (Grid) <11, 2010, Brussels>
Fraunhofer SCAI ()
negotiation constraints; open grid forum; Re-Negotiation; SLA negotiation; WS-agreement

The Web Services Agreement specification defines a normative language to formulate Service Level Agreements and a basic protocol to come to to expose service-level descrip- tions, validate service-level requests, and come to an agreement. This protocol, often called "take-it-or-leave-it", allows a service provider and a service consumer to decide whether to accept or reject a service offer. Although this approach is sufficient for a number of use cases, others exist with requirements for multi-step negotiation or the adaptation of an existing agreement. In this paper, we describe the Web Services Agreement Negotiation protocol, a proposal by the Open Grid Forum to extend the existing specification. This proposal is the result of combining various research activities that have been conducted to define protocols for negotiating service levels or to supersede the existing "take-it-or-leave-it" protocol. The main characteristics of this proposal are the multi-round negotiation capability, re-negotiation capability, and compliance with the original specifi- cation.