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Erschienen in:
2011 | OriginalPaper | Buchkapitel
The SLA Model
verfasst von : Keven T. Kearney, Francesco Torelli
Erschienen in: Service Level Agreements for Cloud Computing
Verlag: Springer New York
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This chapter describes the SLA model that has been developed by the SLA@SOI project. It defines a syntax for machine-readable Service Level Agreements (SLAs) and SLA templates (SLA(T)). Historically, the SLA was developed as a generalisation and refinement of the web service-specific XML standards: WSAgreement, WSLA, and WSDL. Instead of web services, however, the SLA model deals with services in general, and instead of XML, it is language independent. The SLA model provides a specification of SLA(T) content at a fine-grained level of detail, which is both richly expressive and inherently extensible: supporting controlled customisation to arbitrary domain-specific requirements. The model has been applied to a range of industrial use-cases, including: ERP hosting, Enterprise IT, live-media streaming, and health-care provision. At the time of writing, the abstract syntax has