SOAP, Web Services (WS) have reached the point where mainstream customers are beginning to use them. Based on the authors experience, most successful WS applications reside inside the enterprise, where they help integrate disparate systems. Typically, these integrations are based on fairly simple uses of SOAP and Web Services Description Language (WSDL), with homegrown security also present in some cases. The numerous WS specifications introduced by various parties. Unfortunately, converting those specifications into actual industry standards is elusive.