At the moment there is only the possibility to define the URL of the WSDL in the properties of the signature.
It would be convenient if there is a possibility to add the URL of the WSDL to the properties of the proc statement newinstance. By string substitution (%%url%%% or %%$logical(\\\\\\\"\\\\\\\"URL\\\\\\\"\\\\\\\")%%%) it is possible to let the URL be determined at runtime. This functionality is convenient in the case where there is more than 1 webserver on which the same WSDL can be found (for example production, test, development, etc). It could be that there are running webservers on different machines (running on different hosts) or more webservers running on 1 machine (running on different ports).