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Spotted in Cincom Smalltalk Blog - Smalltalk with Rants. What James says is generally true if you start using SOAP as if it were an RPC. The big difference with SOAP is that it can deliver a payload that isn't just RPC, but can be any kind of XML document.

This is very significant, because we're suddenly transfering a lot of /information/, not data. You do not get this advantage if you use SOAP for rpc. BTW, WSDL encourages people to use RPC. Little wonder why it's so laboured, big and complicated eh?