By default, the service metadata (WSDL) generated by WCF will tell its users that all parameters to your operations are optional. This example demonstrates how to modify the generated WSDL and accompanying XML schemas at runtime.

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One of the major challenges in Real World SOA enterprise applications is the lack of semantic information associated with Service Contracts. For a while now the W3C folks have been working in different efforts for relating semantic web Standards (RDF, SPARK, etc) with Web Service basic standards (SO...