Abstract

This paper is concerned with the application of Web services to distributed, cross-organizational business processes. In this scenario, it is crucial to answer the following questions: Do two Web services fit together in a way such that the composed system is deadlock-free? – the question of compatibility. Can one Web service be replaced by another while the remaining components stay untouched? – the question of equivalence. Can we reason about the soundness of one given Web service without considering the actual environment it will by used in?

This paper defines the notion of usability – an intuitive and locally provable soundness criterion for a given Web services. Based on this notion, this paper demonstrates how the other questions could be answered. The presented method is based on Petri nets, because this formalism is widely used for modeling and analyzing business processes. Due to the existing Petri net semantics for BPEL4WS – a language that is in the very act of becoming the industrial standard for Web service based business processes – the results are directly applicable to real world examples.

Keywords

Business Process Modeling Web Service BPEL4WS Tool based Verification Petri nets 

References

  1. 1.
    Alonso, G., Casati, F., Kuno, H., Machiraju, V.: Web Services. Springer, Heidelberg (2002)Google Scholar
  2. 2.
    Andrews, Curbera, Dholakia, Goland, Klein, Leymann, Liu, Roller, Smith, Thatte, Trickovic, Weerawarana: BPEL4WS – Business Process Execution Language for Web Services. OASIS, Standard proposal, Version 1.1 (July 2002)Google Scholar
  3. 3.
    Ben-Abdallah, H., Leue, S.: Syntactic detection of process divergence and non-local choice in message sequence charts. In: Brinksma, E. (ed.) TACAS 1997. LNCS, vol. 1217. Springer, Heidelberg (1997)CrossRefGoogle Scholar
  4. 4.
    Gottschalk, K.: Web Services architecture overview. In: IBM developerWorks, Whitepaper (September 2000), http://ibm.com/developerWorks
  5. 5.
    Grefen, P.W.P.J., Angelov, S.: Three-Level Process Specification for Dynamic Service Outsourcing. In: Ehrig, H., Reisig, W., Rozenberg, G., Weber, H. (eds.) Petri Net Technology for Communication-Based Systems. LNCS, vol. 2472. Springer, Heidelberg (2003)CrossRefGoogle Scholar
  6. 6.
    Hamadi, R., Benatallah, B.: A Petri Net based Model for Web Service Composition. In: Proc. of ADC 2003, Australian Computer Society, Inc (2003)Google Scholar
  7. 7.
    Kavantzas, B., Ritzinger, L.: Web Services Choreography Description Language. W3C Working Draft, Version 1.0 (October 2004)Google Scholar
  8. 8.
    Kindler, E., Martens, A., Reisig, W.: Inter-operability of Workshop Applications – Local Criteria for Global Soundness. In: van der Aalst, W.M.P., Desel, J., Oberweis, A. (eds.) Business Process Management. LNCS, vol. 1806, p. 235. Springer, Heidelberg (2000)CrossRefGoogle Scholar
  9. 9.
    Kreger, H.: WSCA – Web Services Conceptual Architecture. IBM Software Group, Whitepaper (2001), http://ibm.com/webservices/pdf/WSCA.pdf
  10. 10.
    Martens, A.: On compatibility of web services. Petri Net Newsletter 65, 12–20 (2003)Google Scholar
  11. 11.
    Martens, A.: On Usability of Web Services. In: Calero, Diaz, Piattini (eds.) Proc. of Intl. Conference Workshop WQW 2003, Rome, Italy (December 2003)Google Scholar
  12. 12.
    Martens, A.: Verteilte Geschäftsprozesse – Modellierung und Verifikation mit Hilfe von Web Services. PhD thesis, WiKu-Verlag Stuttgart (2004)Google Scholar
  13. 13.
    Martens, A.: Simulation and equivalence between bpel process models. In: Proc. of Intl. Conference DASD 2005, San Diego, California (April 2005)Google Scholar
  14. 14.
    Nielson, F., Nielson, H.R., Hankin, C.: Principles of Program Analysis. Springer, Heidelberg (1999)MATHGoogle Scholar
  15. 15.
    Norta, A.: Web Supported Enactment of Petri-Net Based Workflows with XRL/flower. In: Cortadella, J., Reisig, W. (eds.) ICATPN 2004. LNCS, vol. 3099, pp. 494–503. Springer, Heidelberg (2004)CrossRefGoogle Scholar
  16. 16.
    Reisig, W.: Petri Nets. Springer, Heidelberg (1985)MATHGoogle Scholar
  17. 17.
    Reisig, W.: Elements of Distributed Algorithms – Modeling and Analysis with Petri Nets. Springer, Heidelberg (1998)MATHGoogle Scholar
  18. 18.
    Schmidt, K., Stahl, C.: A Petri net semantic for BPEL. In: Kindler, E. (ed.) Proc. of 11th Workshop AWPN, October 2004, Paderborn University (2004)Google Scholar
  19. 19.
    Schmidt, K.: Explicit State Space Verification. Postdoctoral thesis, Humboldt-Universität zu Berlin (2002)Google Scholar
  20. 20.
    van der Aalst, W.M.P.: Modeling and Analyzing Interorganizational Workflows. In: Proc. of CSD 1998. IEEE Computer Society Press, Los Alamitos (1998)Google Scholar
  21. 21.
    van der Aalst, W.M.P.: The Application of Petri Nets to Workflow Management. Journal of Circuits, Systems and Computers 8(1), 21–66 (1998)CrossRefGoogle Scholar
  22. 22.
    van der Aalst, W.M.P.: Interorganizational Workflows – An Approach based on MSC and Petri Nets. Systems Analysis - Modelling - Simulation 34(3) (1999)Google Scholar
  23. 23.
    van der Aalst, W.M.P., ter Hofstede, A.H.M.: Yawl: Yet another workflow language. Qut technical report, fit-tr-2003-04, Queensland University of Technology, Brisbane, Australia (2003)Google Scholar
  24. 24.
    van Glabbeek, R.J.: The Linear Time - Branching Time Spectrum. In: Baeten, J.C.M., Klop, J.W. (eds.) CONCUR 1990. LNCS, vol. 458. Springer, Heidelberg (1990)Google Scholar
  25. 25.
    Web-Ontology Working Group. Ontology Web Language for Web Services. OWL-S 1.1 (November 2004)Google Scholar
  26. 26.
    Wombacher, A., Fankhauser, P., Mahleko, B., Neuhold, E.: Matchmaking for Business Processes. In: Proc. of EEE 2004. IEEE Computer Society, Los Alamitos (2004)Google Scholar
  27. 27.
    WOMBAT4eS. Workflow Modeling and Business Analysis Toolkit for Web Services. hompage, http://www.informatik.hu-berlin.de/top/wombat/

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Axel Martens
    • 1
    • 2
  1. 1.Department of Computer ScieceHumboldt-Universität zu BerlinBerlin (Adlershof)Germany
  2. 2.Component Systems GroupIBM T. J. Watson Research CenterHawthorneUSA

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