Service oriented computing represents the convergence of technology with an understanding of crossorganizational business processes. A service license describes the terms and conditions for the use and access of the service in a machine interpretable way. Generally, a service provider defines individual services with corresponding service licenses which consumers have to follow. Often, service consumers are interested in selecting a service based on certain licensing terms and/or in composing individual services depending on their needs. Thus, consumer-specified licenses become pivotal in service composition as this allows consumers to make a preference on what their service licenses should be and whether they can compose certain services together in a composition satisfying their specified licensing terms. In this paper, we propose an approach allowing service consumers to specify service licensing terms and select services that match licenses and implement this approach within a semi-automated service composition framework. Furthermore, we present a directional matchmaking algorithm to compare a consumerspecified service license with provider-specified service licenses and produce a composite service license satisfying the consumer-specified license.

1. G.R. Gangadharan 1 , Hong-Linh Truong 2 , Martin Treiber 2 , Vincenzo D‘Andrea 1 , Schahram Dustdar 2 , Renato Iannella 3 , Michael Weiss 4 [email_address] 1 University of Trento, Italy 2 Vienna University of Technology, Austria 3 National ICT Australia, Austrilia 4 Carleton University, Canada Consumer-specified Service License Selection and Composition 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid

9. Subject Scope of Rights Financial Terms Warranties, Indemnities, Limitation of Liabilities Evolution ODRL Asset Model Extended ODRL Rights Model Representation of SLA in ODRL Representation of Service Evolution in ODRL Background: ODRL-S Service License Model 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid ODRL-S is nominated by the ODRL consortium as a standard for representing service licensing and currently open for public review at a Working Group (ODRL-S WG).

12. License-aware Service Composition Framework Service Evolution Management Framework (SEMF) 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid User interface, Web services consumers Service Selection Request Handler FCA (Function Compatibility Analyzer) LCA (License Compatibility Analyzer) Service Discovery Resource Management Service Information Functional parameters license clauses Services and licenses Functional parameters Compatible services license links License clauses and links Compatible license

15. Managing Service License using SEMF (cont.) 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid

24. Illustrating scenario: examples of licenses 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid LocationService License ReservationService License Consumer-specified license

25. <o-ex:permission> <sl:composition/> </o-ex:permission> <o-ex:permission> <sl:derivation/> </o-ex:permission> <o-ex:permission> <sl:composition/> </o-ex:permission> Consumer-Specified Service License LocationService License ReservationService License Illustrating scenario: Consumer Specified SL Composition Compatible Compatible 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid

26. <o-ex:permission> <sl:composition/> </o-ex:permission> <o-ex:permission> <sl:derivation/> </o-ex:permission> LocationService License ReservationService License Illustrating scenario: Consumer Specified SL Composition Compatible 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid

27. <o-ex:offer> <o-ex:permission> <sl:composition/> </o-ex:permission> <o-ex:requirement> <o-cc:attribution/> </o-ex:requirement> <o-ex:requirement> <o-cc:sharealike/> </o-ex:requirement> </o-ex:offer> Illustrating scenario: Resulting Composite Service License 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid

29. Thanks for your attention! Feedback, suggestion, research collaboration are more than welcome! Hong-Linh Truong Distributed Systems Group Vienna University of Technology [email_address] https://www.vitalab.tuwien.ac.at/autocompwiki 7th IEEE ICCBSS, 25-29 Feb 2008, Madrid