Abstract
Virtual organizations (VOs) have been proposed as an answer to the characteristics of highly competitive global business environments. Organizations collaborating within a VO are interacting by consuming and providing services to each other to finally provide services to their customers. Novel models for semantic description of VOs are still to be proposed to foster and reduce the costs of VO creation. In this paper, virtual organizations are first presented as a potential implementation of service oriented architecture at organizational and cross-organizational level. Next, a formal model of service network schemata is presented. A service network schema is a graph consisting of classes of services entities—i.e., service interfaces, consumers, and providers—and classes of links between them. Then, service network schemata are proposed as a means for semantic modelling of VOs, with concepts needed to define a VO being defined as nodes of service network schemata, and relations between concepts being defined as classes of links.
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