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First, please have a look at the online tutorial and learn them.
http://www.talendforge.org/tutorials/tu … idTuto=100
When creating a new service, you can import a existing WSDL or creating a new WSDL. Please see the user doc TalendOpenStudio_ESB_UG_xxx_EN.pdf to learn how to create a new WSDL, and then assign an associate job to the service.