The 2005 IEEE International Conference on Web Services (ICWS 2005) is the THIRD international conference focusing on Web Services. ICWS is a forum for researchers and industry practioner to exchange information regarding advancements in the state of the art and practice of Web Services, as well as to identify the emerging research topics and define the future of Web Services computing. ICWS 2005 is sponsored by IEEE Computer Society Technical Steering Committee (a.k.a. Technical Community) for Services Computing (TSC-SC) .