Web services are programs that can be accessed remotely using different XML-based languages. What these programs can do (that is, the functionality they implement) is described in a standard XML vocabulary called Web Services Description Language (WSDL). For example, a banking Web service may implement functions to check an account, print a statement, and deposit and withdraw funds. These functions are described in a WSDL file that any consumer can invoke to access the banking Web service. As a result, a consumer does not have to know anything more about a Web service than the WSDL file that describes what it can do.
OEPE lets you to build enterprise-class Web services that employ standard Web service technologies, such as XML, SOAP, and WSDL. OEPE simplifies Web service development by allowing you to focus on application logic, rather than the complex implementation details traditionally required by these technologies.
For more information, see Web Services Support.