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Formation of Adaptive Service Value Networks

Formation of Adaptive Service Value Networks. Rudi Studer, Sudhir Agarwal, Stephan Bloehdorn, Sebastian Speiser Dagstuhl-Seminar Service Value Networks, July 26, 2010. Agenda. Service Value Networks Formation of Service Value Networks Role of Policies in Service Value Networks

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Formation of Adaptive Service Value Networks

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  1. Formation of Adaptive Service Value Networks Rudi Studer, Sudhir Agarwal, Stephan Bloehdorn, Sebastian Speiser Dagstuhl-Seminar Service Value Networks, July 26, 2010

  2. Agenda • Service Value Networks • Formation of Service Value Networks • Role of Policies in Service Value Networks • Conclusions and Outlook Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  3. Basic Setting Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  4. Service Value Network - Scenario • Service providers register their services • Customers request certain services • Providers will offer their services • Brokers might offer added-value services by composing 3rd party services • Infrastructure is needed for formation of SVNs and for their execution Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  5. Agenda • Service Value Networks • Formation of Service Value Networks • Role of Policies in Service Value Networks • Conclusions and Outlook Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  6. Formation of SVNs • Request driven SVN formation • Will support brokers in the autonomous and ad hoc formation of SVNs based on individual customer requests for specific scenarios • Parameterized SVN formation • Will support brokers in the autonomous and long-term formation of SVNs based on aggregated demand projections for a range of parameterizable usage scenarios • Assisted service innovation • Will support service providers in innovating their service offerings by forming SVNs which provide additional functionality to meet an entirely new, maybe only partially known market demand Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  7. Request Driven SVN Formation • High degree of automation needed to make ad-hoc SVN formation worthwhile • Exploit semantic descriptions • Ad-hoc SVN formation may require parameterized SVN formation in many cases Ad-hoc SVN Formation Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer User context Goal of theuser Context SVN foruser‘sspecificgoal ... User profile History

  8. Parameterized SVN Formation • A parameterized SVN represents a generic solution for a problem class • User request describes the problem class and desired properties of the generic solution,including preferences • Parameterized SVNs need to beinvoked with appropriate parameters for a concrete problem instance Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  9. Parameterized SVN • A paramerized SVN is a collection of services and other SVNs composed together with the help of a coordinating process • Coordinating Process: • ensures the desired data flow among component processes • Maps outputs of a process to inputs of another process • ensures the desired control flow to coordinate the processes A servicevaluenetwork P1 Coordinating Process P2 Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  10. Suprime Framework for Parameterized SVN Formation • Services as well as SVNs are described formally with process algebra expressions (behaviour), ontologies (domain objects) and semantic SPKI certificates (NFPs) • Preferences and constraints on desired functionality and NFPs contain • Set of inputs that a user wish to provide • Set of outputs that a user wish to obtain from the SVN • Relations between inputs and outputs • Desired NFPs • User preferences on various property combinations to rank the SVNs • See: http://km.aifb.kit.edu/projects/suprime/ Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  11. Assisted Service Innovation • Service providers / brokers can have ideas for new SVNs to offer so far not available functionality • they create the SVN and publish the new SVN • they monitor the usage of the SVN • Automated SVN formation, publishing and usage monitoring will help service providers / brokers in bringing their new ideas into the market Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  12. Agenda • Service Value Networks • Formation of Service Value Networks • Role of Policies in Service Value Networks • Conclusions and Outlook Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  13. Policies in Service Value Networks • Privacy policies • Which data may be transferred to service providers? • What is service provider allowed to do with input data? • Data output policy • What is service user allowed to do with output data? • Service policy • In which situations and for which purposes is the service allowed to be used? • Common structure: allowed usages of data or services=> Usage Policies Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  14. Usage Policies • Terms & conditions, that restrict the usage of Web services • Not all services are freely available to everyone • Not all data belong to the public domain • Formal specification of • allowed usage of resources (services and data) • linked obligations • Still apply after initial access wasgranted Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  15. Suprime-Approach • Model of service usage context • Policy as a classification function, that mapsa usage context to compliant/non-compliant • In case of non-compliance:generate justifications Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  16. Usage Policies withNested Rules and Justifications • Service usage descriptions according to model are used in conditions of rules • Rules can be combined usingANDandOR operators • Justification can utilize user-given groupingand labeling of conditions (nested rules) • Justifications show • what is wrong withcurrent usage • what changes fix this Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  17. Agenda • Service Value Networks • Formation of Service Value Networks • Role of policies in Service Value Networks • Conclusions and Outlook Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  18. Conclusion and Outlook • We discussed different types of SVN formations • What are the relevant criteria • What are the right formalisms • What are scalable algorithms • We discussed the role of policies in SVNs • What are the right formalisms and algorithms • How to provide explanations • Unified view on multi-disciplinary aspects of SVNs need to be modeled and corresponding techniques need to be developed in order to meet real world business requirements Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

  19. We acknowledge contribution by colleagues from • Open University, Univ. of Innsbruck, Univ. of Stuttgart Thank you for your attention! www.ksri.kit.edu Formation of Adaptive Service Value NetworksProf. Dr. Rudi Studer

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