.com/iphone/ Service Delivery Platforms 6. IP multimedia subsystem (IMS); Stage 2. 3GPP Specification TS 23.228. 7. J. Rosenberg et al. SIP: Session Initiation Protocol. RFC 3261, June 2002. http://www. ietf.org/rfc/rfc3261.txt. 8. S. Mittal, D. Chakraborty, S. Goyal, and S. Mukherjea. SewNet-A framework for creating services utilizing Telecom functionality. In Proceedings of the 17th International World Wide Conference, Beijing, China, April 2008. S. Majithia, M. Shields, I. Taylor, and I. Wang. Triana: A graphical web service compo- sition and execution toolkit. In Proceedings of IEEE International Conference on Web Services, San Diego, USA, 2004. 10. V. Agarwal, K. Dasgupta, N. Karnik, A. Kumar, A. Kundu, S. Mittal, and B. Srivastava. A service creation environment based on end-to-end composition of web services. Proceedings of the 14th International World Wide Conference, Chiba, Japan, May 2005. 11. A. Sheth, K. Sivashanmugam, J. Miller, and K. Verma. Framework for semantic web process composition. In Special Issue of the International Journal of Electronic Commerce (IJEC), 9(2), 2, 2004. 12. M. Dumas, J. Kalagnanam, L. Zeng, B. Benatallah, and Q. Z. Sheng. Quality-driven Web Services Composition. In Proceedings of the World Wide Web (WWW) Conference, Budapest, Hungary, 2003. 13. J. Miller, J. Arnold, J. Cardoso, A. Sheth, and K. Kochut. Quality of service for work- flows and web service processes. Journal of Web Semantics, 1(3), 281-308, April 2004. 14. IBM QEDWiki. http://services.alphaworks.ibm.com/qedwiki/ 15. Yahoo Pipes. http://pipes.yahoo.com/pipes/ 16. BEA AquaLogic Family of Tools. http://www.bea.com/framework.jsp?CNT=index. htm&FP=/content/products/aqualogic/ 17. JackBe PrestoStudio.http://www.jackbe.com/Papers/JackBe-StudioOverview.pdf 18. Microsoft Connected Services Framework Sandbox. http://www.microsoft.com/ serviceproviders/solutions/connectedservicesframework.mspx 19. Third-generation partnership project. http://www.3gpp.org 20. A. Orita, M. Kakemizu, and M. Wakamoto. Unified IP service contr