As defined in Web Services Description Language (WSDL) grammar, a solicit-response operation contains input and output elements, with output first and then input, as shown in Listing 1.
WS-Policy provides a flexible and extensible grammar for expressing the capabilities, requirements, and general characteristics of entities in an XML Web services-based system.
WS-Policy 提供了灵活的可扩展语法来表述基于 XML Web 服务系统中的实体的功能、要求和一般特征。
3
WSFL builds heavily on the Web Services Description Language (WSDL), an XML-grammar for describing individual Web Services.