Philosophical Split Hurts Web Services Adoption

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There is a serious split in Web services implementation philosophy that is threatening to stall the benefits of the technology to businesses and
consumers. The WSDL 1.1 specification allows programmers to choose between remote procedure call (RPC) style and document-style Web services. The
decision is not an arbitrary one as it has ramifications for both message structure and more importantly the interoperability of Web services.

Link: devchannel.org