Novel business scenarios such as Business Value Networks and Extended Enterprizes pose new challenges to enable service value chains across heterogeneous organizational boundaries. In these business scenarios, service choreographies result into hierarchical structures of added value. Service Level Agreements (SLAs), which are contracts between consumers and providers, guarantee the expected quality of service (QoS) to different stake holders at various levels in this hierarchy. So far, the aggregation of SLAs has been treated as a single layer composition. Therefore, we address the strong requirement of describing, modeling and maintaining this hierarchical SLA aggregation associated with service value chains. In this paper we propose a framework to enable hierarchical SLA choreography, aggregation, and validation for business value networks.

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