Extending WS-Agreement for Dynamic Negotiation of Service Level Agreements

Services in commercial or scientific environments often need to be delivered at guaranteed service level. This becomes even more important, if composition of services is required. WS-Agreement is a proposed recommendation of the Open Grid Forum (OGF) defining a language and a protocol to create SLAs. As the current version of the specification of WS-Agreement provides only a simple, one-step approach for the creation of SLAs the GRAAP working group of the OGF started working on a more sophisticated protocol allowing multi-step negotiations to create agreements. This paper presents the approach for negotiations of SLAs using WS-Agreement under specification at the OGF. It describes the state of the work and gives an outlook of the next steps until the specification will become a proposed recommendation.