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One of the goals of SOA has been to decouple services by exchanging human-readable business documents instead of programming parameters. However, in implementing SOA, many businesses have simply used web services to expose the underlying programming models of back-end systems. Procedure oriented integration is nothing more than remote procedure calls implemented via a different protocol. The consequences of this are additional layers of complexity with no improvement in business flexibility. To avoid this, implementers of SOA should first understand the business meaning of their services, then implement human-readable contracts that are independent of legacy system implementation.